This Mannlicher m1910 is for sale in local gun shop. They tell it's caliber is 6,5x54. At first I thought they have make a mistake but then I inspected more carefully it´s sights. The front one seems to be more rear than normaly and the rear sight looks quite much similar like british Enfield rifles have. What do you think ? Klick every photo to get it bigger.

https://www.jennynase.fi/Tuotteet/337-steyr-mannlicher-schoenauer-65x54/#wbs2