Thaine,

Pictures will tell us a lot, if no pictures see if it has a barrel key in the forend.

Also might take notice of the trigger guard,it's hard to get DST's in Mauser guard so many German smiths used a shotgun trigger guard.

The caliber should be engraved on the left side just in front of the action.

Good luck,





MP Sadly Deceased as of 2/17/2014