I searched through Amazon's complete offering of pocket watches limiting myself to watches under $50 and watches having both mechanical and visible internal mechanism.
I tagged about five and this one was the one I singled-out.
I'm very happy with my selection!
I work in a place where I have access to stereoscopic inspection microscopes. I took the liberty of inspecting the workings of this watch. Having windows on both sides of the workings allows inspection of all the internal parts. There are solid plastic (Mineral) windows protecting both sides of the mechanism even with the covers open. The small parts are fun to look at and the moving parts fascinated me for several minutes. With the exception of truly microscopic dust, the internal workings of this watch look like they will last for years. The external casing is solid and uniform with no blemishes or scratches. I however will most likely mess that up :)
The chain is long enough for me to attach at my belt, carrying the watch in the purpose-made pocket of my jeans, with length to bring it close enough to my face to enjoy the innerds and see what time it is. This thing is a fingerprint magnet which might sound like a bad thing but it leads to polishing and handling which is actually entertaining!
So far, the time keeping has been accurate when compared to my Casio atomic-time wristwatch. the pocket watch is very much a "toy" for me as yet.
As this is my first pocket watch I'm very happy that I "got a good one" as they say.
Thank you very much Shoppe Watch and Amazon.com.
update: Be careful of the chain. The link at the clip attached to the watch might be lose. Mine separated and my new watch bounced off the carpet. It's acting weird but I think it'll be ok. I have it apart and am looking at it.
update: The watch lives! If it had been any more expensive I would not have tried to fix it myself... if it was any less durable I would have screwed-up trying to fix it myself :) Beware the chain but please do enjoy the watch!