I just opened the box with my restored, second-tier, watch back from VC's masterful restoration team.
This pocket watch was manufactured in 1914, by Mathey-Tissot on behalf of Vacheron & Constantin, hence the "Fabrique Pour" inscription above the "Vacheron Constantin" engraved on the inner cover. The watch sounds great, actually it sounds better when both covers are open (the minute strikes are occassionally muffled when the cases are cloesed, but not always...a bit strange but I'm still trying to figure out the interaction between the movement and the case that might be causing this).
The movement is 19 lignes and made from German Silver. 25 jewels, bi-metallic balance, hairspring with terminal curve and a "silent strike regulator" that is not silent at all . (The silent regulator on VC's cal 1731 is amazing! )
(a personal note: I used to love Norse mythology and Thor...coincidentally, I love minute repeaters and hammer pictures)
An interesting side note: although I cannot find the Trident trademark logo anywhere on the watch, the CofA states
"Manufactured under the name 'Trident', trademark of Vacheron Constantin between 1884 to 1940."