Artillery luger question

TWIMC, The subject of Commerical production LPO8s is a tricky one. I have seen both military marked LPO8 that were marked "Germany" for export after WW1 and some of these may have been relined to 7.65 somewhere along the way. Some collector's consider these as Commerical LPO8s. It must also be remembered that all German pistol manufactures were severly resticted after WW1 by the provisions of the Versailles Tready that prohibited production of barrel of 100mm (4") or over. So their NEW PRODUCTION COMMERICALS, usually Crown over N proofed on the left receiver, would have left Germany with either 95 or 98mm barrels. Both Stoeger and Pacific Arms catalogs offered the option of instalation here in the USA, of longer barrels in either 7.65 or 9mm from 4 to 22" in two inch increments. The 8" barrels could be had either with or without tangent rear sights and often the rear link rear sight was left on. Generally, these long barrel shooters did have the Tangent rear sight which was different in 2 respects from the military LPO8: the push buttom was on the opposite (right) side of the slider (elevator) which was NOT attached to the base by the bottom of the slider.