Trench Watch Movements Identification

[rodabod]

Hi, in case anyone recognises these, especially the one with the swan neck regulator, could you please let me know? Thanks in advance. 
 

 

[MrRoundel]

The top one with the micrometric regulator reminds me of a Zenith. Not sure though. The others are such common looking ebauches I can't hazard a guess. Good luck.

[AndyHull]

If there are no distinguishing marks on the balance side, then you will need to look under the dials. Even if this doesn't reveal the maker's stamp, there is a chance that they can be identified from the keyless work.

[WatchMaker]

Worth starting with a look at Fabrique d'Horlogerie Fontainemelon (FHF) movements.

David Boettcher has some great information on his site under https://www.vintagewatchstraps.com/movements.php

For instance your second pic looks like a Fontainemelon 2; and your first pic, at least in terms of distinctive bridge shapes, like what David calls a Fontainemelon 6. Do the movement sizes tie up i.e. 13''' = 29.3mm?

 

Edited May 5, 2020 by WatchMaker

[rodabod]

I will have a look at David Boettcher’s website. His site is absolutely fantastic and he is a great engineer/horologist.