Opening Bulova Casement

cant see that model watch on the Bulova web site user manuals
http://www.manualslib.com/brand/bulova/watch.html
if unsure if it needs a battery go to a jeweler or watch or battery seller

some model Bulova Watched instructions
IF YOUR NEW WATCH IS A MECHANICAL WATCH
(no battery)
Mechanical watches differ from Quartz watches in several
respects:
1. No battery changes are needed - they are powered by a main-
spring, which is wound either by wrist movement; or in some
models by daily winding of the setting crown.
2. Because it is a mechanical device, it's accuracy is subject to
the effects of gravity and temperature. You can expect, on the
average, a daily variance of up to 10 to 20 seconds for
mechanical watches.
3. Just like automobiles, these watches require routine mainte-
nance. Due to their mechanical complexity, mechanical
watches require cleaning and new lubrication every 3 to 5
years to run at optimum efficiency.
FOR THE AUTOMATIC SELF-WINDING
MECHANICAL WATCH
it must be wound at least six or seven times before you wear it.
After that, your daily activity should wind the watch sufficiently
to keep it running at night when it is not being worn. If your
normal daily activity is not sufficient, occasional supplementary
manual winding may be necessary. It is suggested that your
mechanical watch be cleaned and oiled periodically to insure
optimum performance. As a mechanical watch, quartz watch
accuracy cannot be expected. References to the power cell do
not apply to Automatic watches

The year made cannot be determined from the SN. Since the '50s Bulova used a 2 character date code, usually below the SN. The letter is the decade, the number is the year. For example, M4 is 1964, N6 is 1976, O5 is 1985, etc. As to value, if it is from 1960 through 1976 (M0 thru N6) it is a "true" Accutron, with a tuning fork movement, is collecrible and valuable, and the actual value depends on which specific movement and which case. Some 1977 (N7) Accutrons are akso collectible rtuning fork watches, but some 1977s are Bulova's first quartz watches, and of no value. Bulova eventually went mostly automatic (self-winding mechanical movement) with their Accutron line. Those are well-made, mid to upper-mid level watches, and of no particular value beyond that of most any good used automatic. Note, however, that there have been numerous versions of the automatic Accutrons, some fancier and nmore expensive than others, and, s ith any good watch, original cost will have an effect on value as a used watch. For example, that retailed at, say, $500 new in 2009 will be worth more today than one that was $250 new in 2009 (assuming comparable condition). There are also now some Accutron IIs, which mimic, in looks and the sweep second hand, the original tuning fork Accutrons. However, while they are well-made watches, they are just another nice quartz watch.

I'd need more info. First, is it a "real" Accutron, made from '60 to '77, or is it one of the things Bulova kept calling Accutrons after they stopped making the tuning fork movement watches? The quartz so-called Accutrons are just a nice old watch, not worth anything special. The self-wind "Accutrons", which Bulova is making now, are just a nice, mid-range aurtomatic watch. On the back of Bulova watches is a date code, usually right under the serial number (SNs themselves really mean nothing where Accutrons are concerned). The code is a letter and a number. If it begins with the letter M, or if it begins with the letter N and is followed with a 0, 1. 2. 3. 4. 5. or 6, it is a "real" Accutron, and is collectible. Some with N7 (1977) are also, but it depends on the actual watch. Bulova did make some quartz so-called Accutrons in '77. If it's a '60 thru '76, and SOME '77s, it has value beyond the scrap gold price. SOME Accutrons are even worth thousands of dollars. White gold Accutrons, compared o yellow gold or stainless, are rarer. Next, WHICH Accutron is it? is it a 214, a 218, a 219, a 220, a 224, or a 230? If it's a man's watch, it is very unlikely to be a 220 or 230 series, If it does not have a winding stem on the side, it is a 214. 214s are the most valuable. If it has a setting stem at 3 o'clock or 4 o'clock, it is either a 218 or 219 (I'd have to open the back and look at the movement to say which ine). If it says "Accuquartz" on the face, it's a 224 (NOT a quartz - the 224 Accuquartz is a hybrid of tuning fork and quartz crystal). Once we know the movement series, we need the case type. Certain cases are much more valuable than others. Then there are the Spaceview, the Astronaut, and the Deep Sea, 3 specific models they made, which are more valuable than most (but not all) of the other cases. The best I can say right now is that, being white gold, there's a good chance it's one of the more desireable specific models. If it's a 214, ESPECIALLY if it's a 1960 (M0), it's worth quite a bit more than just the gold content. To be more specific, I'd have to see a picture of the watch, which I don't think can be posted here. Try looking up "Accutron" on Ebay and see if you can find one that, if yours has a stem, has it in the same place as yours, with the exact same case - same shape, and exact same lugs (the things on either end where the band or strap is attached). Read the description. The description will probably say the movement (214, 218, etc - in fact, the movement may even be in the listing title) and if it is niot just a plain round case, probbly will say the case type (Alpha, Asymmetric, Butterfly, etc.). If it's an Astronaut, a Spaceview, or a Deep Sea, it will certainly say that. Also, look at the Accutron section of the Bulova entry in Wikipedia. (Yeah, I wrote it, but it has info that just might help you pin down exactly what you have) When you find out more about which Accutron it is, post another question under Axcutron watches here. I'll check every couple of days for the next week or so, and if I see your post, I'll narrow down the value some more.

The only people who are likely to be able to answer your question is accutron (assuming that they keep records that far back- which they might).

Go to http://www.bulova.com/brands/accutron/accutron.aspx?brand=accutron and scroll down to the bottom of the screen and click on "contact us"

Bulova Accutron watches were originally designed to use Mercury batteries of 1.35 volts, since they were the only type manufactured then. The pic (left) shows an original 214 all-metal "top hat" cell, before 387 cells with the plastic spacer became available. In most areas of the world, mercury-based batteries are no longer available, due to environmental concerns related to the safe disposal of them. The Tuning Fork watches manufactured by Esa (e.g the f300 Omega) were designed to run on either mercury or silver oxide batteries without any adjustment, provided the last repairer to work on the watch set up the index mechanism according to factory specifications.
It is strongly recommended that you do not replace batteries yourself, as special tools are required to open the watch case without damaging it. The only exception to this is the Accutron 214 model, which has a small battery hatch on the back.

mcdevito75 here, Bulova Accutron, nice watch, of course there are many, many factors that go into the value of any watch, depending on Maker, Model, Condition of the watch also. I would figure your Bulova Accutron is in the area of $125.00------- $200.00 range. Your best bet is to find a jeweler in your area or an appraiser, even online for the latest value of your watch.

mcdevito75 here, The movement number tells all, but I would figure the yaer somewhere in the 80"s and value at $250----$350.-- Accutron very collectable watch. Look for a small watch repair shop in your area for more accurate info. Hope this hepls.

Serial numbers are generally on the back of the watch.

You may be able to find two or three numbers on the watch.

A case number, a movement number and a serial number.Alternatively you might find a style number (which in your case is 26B44) and a serial number.

looking for a battery cover to suit model D 377 tissot men's twotimer II vintage 1992.