.45 luger #20 received from "Lugerman"

[DonVoigt]

Originally Posted by LugerMan.com

We used Commercial style positioning of the numbers, and commercial guns never had barrel sizes put on.
As soon as army contract rolls around we will change the markings to army style
Caliber mark is on as per ATF regulations

Well, actually DWM did kind of put the barrel "size" on early commercial pistols; they used the arcane # of lead balls to the pound to designate.

Like that below on a 1906 BUG proofed 7,65mm, the numbers are 178,31 (balls to the pound):