I have a behr bros upright piano style AA. Can you tell me what year it was made

https://antiquepianoshop.com/online-museum/schaff-brothers/

Good Piano, buy little on them

https://www.google.com/search?q=schaff+bros+co+baby+grand+piano+serial+number+lookup

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It sounds like you are referring to the fallboard or key cover of your Grimmel Bros upright piano. To close the fallboard, gently push it up towards the piano's music stand until it clicks into place. The curved part you mentioned is probably the key cover, which can be lowered to protect the keys from dust and debris when the piano is not in use. To lower the key cover, grasp it at the center and gently pull it towards you until it lays flat over the keys. If your cats are causing problems by jumping on the piano keys, you may want to consider covering the piano with a fitted cover or keeping the room door closed to prevent them from accessing the instrument.

There is a lot of information required to value a piano like that. According to records, that piano was made around 1910. The things that we don't know and cannot verify is the condition of the unit; wood type, physical damage, care etc all are considered. You need to have an appraiser come and look at it. You may be able to take very clear direct photos and submit those to an appraiser.

Kimball piano values vary based on age and condition; as of 2015, many uprights sell for $10,000 or more. Kimball is a well-known brand, and several of its antique pianos are considered highly collectible.
The Kimball Piano Company, based in Chicago, was one of the largest piano manufacturers in the world. At the turn of the century, Kimball built approximately 20,000 pianos annually. Kimball produced pianos under different brand names such as Hinze, Dunbar, Whitney and Harrison. Styles were influenced by Victorian, Greek Revival and Arts and Crafts architecture, and upright models were often available as player pianos. Kimball was sold to the Jasper American Corporation in 1959, and its pianos were discontinued in 1996.

this site will help with your estimate
Baldwin Piano Prices and Value Upright Grand New Used

https://www.alphapianostudio.com/

"Great teacher (Sandy) with lots of patient. Friendly and nice and also passionate till I have little time to rest my poor little hand. Learned for about a year plus and now can play more fluently and confidently. Price is acceptable and duration is just nice."

I hope this helps. I can tell you that pianos age like people. How old is your Baldwin? Baldwins also are not made anymore, but I don't think that makes them particularly prized. Alot depends on its condition. I do not know to what the serial # and style # refer. If by upright you mean not a spinet or console, this type is usually found relatively inexpensively (<$1,000), especially if it is not a player piano. I would suggest that you take several good pictures of it to a local piano store for an estimate.

Warning: Very long-winded reply approaching.

Sturz Brothers pianos were established in New York state in 1871, and seem to have the reputation as "[Sturz Brothers]...pianos and piano-players are distinctly high-grade instruments" (per http://www.bluebookofpianos.com/).
I can't find any information as to when they ended making them.
All of which is great, but:
Be aware when dealing with antique pianos:
Many of the old (say, 1850 to 1940) pianos were made by companies that are no longer in business (failed, or bought out
by a competitor), or companies that built the instrument under another name.

Pianos back then were not really mass-produced, they were hand crafted- and each manufacturer made their piano very
differently, so:
Short Version: there will be parts that will work on only that *one* model of piano, so getting parts will be difficult if not
impossible.

Long Version: Musical instrument craftsmen (craftspersons?) love to innovate, for a variety of reasons: they may find a
new way, for instance, to connect the key to the hammer that strikes the corresponding note. It might be a better way to
do it, or, more often, it was to come up with a cheaper way to do it.
The point I'm making is that your Struz Brothers piano will have parts that are totally different from, say, a piano made by
either Krakauer Brothers, Doll, Jacob & Sons, or Mathushek & Son Piano Company (companies that started around the
same time as Sturz Brothers). The parts may vary from one year to the next, or even one model to another.

So, if your Sturz Brothers piano needs a key replaced, or the harp has bent under pressure, the soundboard is cracked,
or any number of things that can plague an old instrument, you'll need to either
A) find someone that is willing to sell parts from a similar model (if they're parting it out, it has more problems than
yours does), OR
B) you'll need to have the part manufactured from scratch by craftsmen that specialize is rejuvenating old pianos. This
will be expensive far, far beyond what the piano is worth- and these craftsmen live very well, BTW...

Last Caveat: Upright models sell for much less (and the term "Upright Grand" was just an advertising phrase, there is
no such animal.) Uprights (spinets particularly) sound very... tinny, is the best description I can think of. Tinny like the
toy piano your granma gave you when you were five- remember, the black keys were painted on? Tinny like that.
So, unless the piano is a Steinway & Sons, a B?sendorfer, or a Fazioli, don't count on huge offers for your instrument.
And if it came to you from your great-aunt Tilly and you can't bear to part with it, that's great, I understand sentimental
value. Just know that this will cost a great deal to bring to playing condition.

I'm often told "But the keys all work, the pedals are still tight, and the tuner told me that it's not a bad piano!" All this is
true. But please remember that professional buyers know all of these potential pitfalls won't offer much, and the guy on
Craigslist that needs to replace the piano for Great-Aunt Tilly can't afford much.
Good luck!

I don't have much. The Pierce Piano Atlas states that they were formed in NYC in 1871 and changed their name to Sturz & Sons in 1885. Address was 142 Lincoln.

I'm guessing that this was built close to the name change. So, 1880-1885. This is strictly a guess since there is no way to find out how many pianos they built in a year.

Here is an ad page from an unknown date that states just the opposite. It states that Sturz & Sons was changed to Sturz Bros., so I have no idea when it was built. Pre-1900 I'd bet. You can rarely find the date on one of the end keys. You have to pull the key out and look at the side.

Well my friend, not knowing exactly what model this is, makes this a difficult question to answer as the market for upright pianos is really shrinking, but that's not to say it has no value. I can tell you that all pianos need tuning after being moved even down a flight of stairs so don't worry about that detracting from the value. More details would be helpful in answering this question.