I need some help identifying this Luger

[histman44]

Hello, everybody!
I'm new to the forum, as well as to identifying specific Lugers. I bought this in 2005, and was told it was a 1920 Commercial. I began doing some homework, and discovered that commercials had serial numbers hidden on parts, which this one does not. I also has two eagles: one on the right side of the reciever, with a crown over a letter, and the other eagle is on the left hand side of the barrel, which, from what books, and websites I've looked at, did not exist on 1920 Commercials It also has the Nitro proofs on the toggle, and reciever.

The crown over letter on the right side reciever.

The eagle on the right hand reciever, just ahead of the crown.

The eagle on the LH side of the barrel.

The LH reciever. serial number 7978, with the 78 stamped on the cover plate, and 93 of the other serial 6193 on the frame. Also appearing is the eagle on the barrel.

The RH reciever. With the crown letter, and eagle.

The magazine matching the frame, with the "i" suffix, and WaA eagle over 63, or 83.

The frame serial; 6193, with "i" suffix below. The barrel also has a suffix, I think the "i".

The "DWM" banner on the toggle, with the "78" serial stamp behind.
Does anybody have any ideas?
All right. Some new, modified pics.

Right hand reciever.

Left hand reciever.

Top of toggle.

magazine.
Hope these are of more help. I apologize for the haziness. My camera is an "antique" as it were, and photoshop hasn't helped any. Sorry.