The marks are very small so have had to take through a jewellers loupe , I think there descent enough to make out.
Minerva 950 finese mark as well as this NV mark with * mark above and below... Could also be AV mark if viewed the other way?
Looking for maker and from that a probable age. I would guess probably late 19th century?
![Image](http://img.photobucket.com/albums/v439/vintagecollector/Subbuteo/P1790200.jpg)
![Image](http://img.photobucket.com/albums/v439/vintagecollector/Subbuteo/P1790201.jpg)
![Image](http://img.photobucket.com/albums/v439/vintagecollector/Subbuteo/P1790202.jpg)
![Image](http://img.photobucket.com/albums/v439/vintagecollector/Subbuteo/P1790203.jpg)