mine is 91817 i also have the V1 mark ,herroktor what was yours regulated with i have a 375 H+H,full side lock and ejectors feels so sweet in the hands this is gonna be a fun gun it just feels good this gun was well cared for but needs to be cleaned which will be the first order ,finally a 375 sxs ,as i look back its only been a few years and now i have OU AND SXS up to the 600 i know i will never own a 700 but i am interested in the 500 ,but first i want a walk in gun room to enjoy my passion whenever i want