Commercial SN ?

[livingthepast]

Hello All,

Ok, I'm confused. I've read in posts that commercial lugers were sn'd in numerical order meaning 1 - last one manufactured. As opposed to military which used the 1-10000 with alpha code sn's. So why do all these commercial lugers (including my new one)have military style 1-10000 alpha codes? Granted I can understand ex military reworks that were remarked for export. Using mine as an example. The lower receiver is mostly matching with military sn's. The upper receiver is matched barrel with rear toggle sn. It looks as if a date was arsenally ground off of the top of the receiver, I can't tell if it had a military sn on the side, and its marked DMW and has the "Germany" mark. Also the barrel, toggle and receiver side are nitro n marked. I know this question is a bit disorganized, but bear with me. Lastly, if I follow the reasoning that my luger is a remarked military left over, then how did they rechamber it to 7.65? Wouldn't it have originally been 9mm? Thanks for any info.
Brian