Need Help Identifying Universal chronograph movement

[myk]

Hi all!
I need help identifying a Universal chronograph movement.Diameter 37 mm.
Thank you for your help!

 

[Bernhard J.]

Interesting logo above the "6".

 

[gmorse]

Hi myk,

Interesting logo above the "6".

According to Mikrolisk, this mark belonged to Perret & Berthoud SA in Genf, registered in 1929.

Regards,

Graham

 

[myk]

Thank you Graham !!! What the caliber ?

 

[John Cote]

My guess would be a Martel 16 (second series) which is more or less the same as the UG 339. Thanks to my friend GT from Florence Italy for this catalog page. Martel made movements for both Zenith and UG. In the end, in the late '50s or early '60s, I believe that Zenith bought Martel.

 

[myk]

Hairspring

 

[Mark020]

Interesting logo above the "6".

Called the Savoy knot