Just received this watch in today's mail. With "Tiffany" engraved on the case, dial and movement, figuring out who the retailer was isn't rocket science. But, what I would like to determine is who made the movement. I have an idea, but am not sure. So, take a look at the scans listed below, and tell us who you believe made the watch and cite or attach any evidence or documentation you might have to support your conclusion. To help with the size, the movement is 19 lignes, the case is 49.08mm in diameter (not counting the pendant).

http://photos28.flickr.com/36593081_7d4a578ced_b.jpg

http://photos23.flickr.com/36593082_ec0eaeff2d_b.jpg

http://photos27.flickr.com/36593083_016f38dbf6_b.jpg

http://photos25.flickr.com/36593084_b69204f49f_b.jpg

http://photos29.flickr.com/36593085_30be1c1817_o.jpg

hi ed, my first guess is " IWC " and my only supportive reason is located on page 493 of the blue 2002 watch guide

Hi Ed:
My guess is Vacheron & Constantin. Only from the high quality of the peice.
Joel Sarich

This is a good guessing game.
Check the picture on page 470 in Shugarts #25.it looks close. Of course these companies traded movements around quite a bit,I think.
I sometimes think there was a little old man working in a basement somewhere that was afraid to let anyone know who he was.
How many companies were in business in 1867 that had the means to make a movement like this?
It's a fine piece of work for any year.
Good luck.
J Smith

Here is an update on the 20 jewel Tiffany I posted for identification assistance a while ago. Sorry for the delay, but I wanted to do some more research before coming to any conclusion. I want to thank all who responded for their help with an interesting horological problem.
I'm fairly certain that the maker of my Tiffany was Ed Koehn. Koehn, who was a watchmaker for Patek, Philippe & Co. and later was associated with Ekegrin, also made watches under his own name and made some for Tiffany as well. The Tiffany serial number falls right into line with the numbers used by Koehn. Below are two scans, one of the Tiffany, the second of a 16 size 18 jewel movement marked Ed Koehn.

http://static.flickr.com/23/36593082_ec0eaeff2d.jpg

http://static.flickr.com/29/46993403_8f76e7e473_o.jpg

A side by side comparison of the two movements shows them to be essentially identical, right down to the regulator patent date engraved in the same font.
All comments and opinions are welcome.

For those interested, the patent date is Reed's Patent for the regulator.

It is fascinating that this date appears on watches after 1900 since it had long expired by then.