Rotary Gents Black Leather Chronograph Watch GS00100/04 instuctions

Not all of these watches have a serial number embossed on the back plates. Your simplest solution here is to take it to a dealer who retail this brand and ask them. You could also contact the manufacturer directly with photos of the watch.

Diesel Men DZ7076 Digital Black Leather Watch
Men Diesel Chronograph Watch
Diesel Men DZ7076 Black Leather Quartz Watch

Can be as simple as a Battery (dirty contacts). If not, have the watch cleaned and serviced accordingly.

try one of these off this link > http://www.armitron.com/docs/ArmitronGentsDigital.pdf

Your watch is a chronograph style. yes, it has no date feature, and the three sub dial is has its own functions. it is a stopwatch.

Go to http://www.rotarywatches.com/en/the-rotary-collection/revelation-watches/gs02922-02-19 and you will see "instruction manual" at the bottom left of the page which you can download.

mcdevito75 here, You can contact Casio at 800-706-2534 Optn. 2 for a new owner manual.

mcdevito75 here, You can try to contact Puma watches online, try Puma watches.com or look for a small watch repair shop in your area for replacement strap.

http://www.ronda-startech.com/chrono/main.php?x=functions

If the watch has a Rhonda movement go to the above link for instructions.