Well, if that is a datastring, it sure blows my guess of a date out of the water. It would be #1081 in 1902 with a pre-rifling diameter of 9.6mm. What is the diameter at the muzzle? Maybe it was a later pass thru the proofhouse after some alteration??? If it notes a 2nd pass it should be the diameter of the tube. Any Belgian marks of which to speak????

Franz Denk may have pushed it thru at a later date, using some old components from Johann Springer??? Possibly a rebarrel???? Is there a "4788" on the tubeset anywhere? A check with the Vienna proofhouse with the datastring might yield some info.

Kind Regards,