Looking for Info on this Longines

A good friend of mine inherited this watch last week after his Grandfather passed away. His grandfather had worn it regularly for a very long time, but besides that, nothing about the watch is known. I took a couple pics of it, and was able to remove the movement and dial from the case (when I thought I was just opening a case back) but didn't want to mess with anything further. I'm not even sure if it's a mechanical watch for sure.

Any information about this watch would be greatly appreciated - model, likely time-frame, material, originality etc...

Thanks in advance!

Show us a clear picture of the movement and the inside of the caseback and we can tell you a ton more information.

When I opened the case back, it came off in one piece with the movement, dial, crown etc. Is it supposed to come apart in order for me to get a glimpse of the inside of the caseback?

Thanks for all the info so far!

Finally had a chance to see my friend's watch again last night and was able to pull the following information from the inside of the case-back:

Longines Wittnauer
Watch Co Inc
New York
Geneva Montreal
A61308

And this info off of the movement:
7965XXX
Watch Co Swiss
23Z
Unadjusted
LXW

I couldn't take any pictures that were clear enough to make out any of those words but I'll try again at some point and post them.

Does this info shed any more light on what my friend might have here? Also, he is looking to have it serviced - can anyone recommend a watch maker (who is taking on new work) in the states somewhere who is willing to accept pieces via mail - unless you have someone in the Wash. DC area - then that's even better!

Thanks again OF!