Understanding Watch Hallmarks & Silver Straps - Rotary Watch Inquiry

Question
Hello
      I have a sterling silver Rotary watch which is
hallmarked on the back of the face. The strap looks like it
could be silver too but has no hallmarks.
Would the stamp on the back of the face refer to the whole
watch or would the strap be hallmarked seperately if it was
silver?

Many Thanks
Sarah

Answer
Hello Sarah,
Without  examining it my best guess is that the  hallmark is for  both the watch and band particularly if you suspect the band is the original  one to the watch. Perhaps  look at some  other rotarians watches and  compare their similarities or  gross differences..Also check on the clasp mechanism:most straps or watchbands that have bayonet type clasps (one side slides into  the other and locks securely) have makers marks, fineneess marks, or hallmarks on the clasp as well as on the back of the case.
Hope this  helps,best regards, Ari