gold watch: montral ancre 15 rubis

by Dominique
(France)

I am trying to get more information about this gold watch.

Hallmarks on the back of the watch numbers appear as follows

72
18k
0.750

between what appears to be hallmark of a head and an anvil with 116 imprinted in anvil.

Any chance you may have some information.

Tks much
Regards
DS