I concur for that H. Godin hailed from Herstal and that the platform was commenced there but I'm not sure that the etched pattern welded pattern was completed there seeing I do not see any Belgian marks. Franz Kettner more than likely sourced it and finished it or had it finished. If H. Godin is the owner of the noted breveté / brevet d'invention, the APUN number on the underlever would put it @ some date near the date of filing for protection being nummer 609. Advances in weapons technology were changing rapidly, including powder. H. Godin's contributions would have been top shelf for say 10 years from his 1856 filing, & possibly a bit more. So a client more than likely wanted H. Godin's plaform/bascule système H. Godin or something similar being the latest & greatest; therefore, Franz Kettner obliged him and relieved him of some cash. Not sure how many H. Godin's APUNs are out there, but 609 doesn't seem to be that many. The date may be on the buttplate or on the reverse side.

Cheers,

Raimey
rse