Alan I have a1913 serial number 160 then the 1914 is in 3500 group another is 5669 and then I have a 10000 series numbered 14 as well I will have to pull them all out to look a t serials again . The 13 shoots really well and is still sighted for mkvi ammo serial 5669 ended up in Britishicon army for ww2 the back to Australiaicon the 10000 series was in Aussie service but ended up being sent to Austrian police post ww2. It’s crazy how some rifles where reserialed with the original number in other countries