Please help to ID Luger

[mspf]

Gentlemen,
This is my first post on your forum. I recently became the owner of a beautiful Luger. I was contacted to see if I wanted the item by an elderly lady who said it was an "ruger". I was shocked when I saw it was actually a LUGER! and in fabulous condition. The woman who had the pistol said it had belonged to her husband who was a Customs Inspector. Inside the holster was a card signed by the Chief of Police in 1929, idenitfying the make, model, serial number and owner, complete with his finger print and date of birth in 1903. Her husband also wrote his name and agency inside the holster.

I am new to the Luger world and I ran it by a Gunsmith friend of mine who advised me it was a .30 caliber, 1920 Commercial Model. I have seen a wide variety commercial models on the internet in various conditions. I would like to nail down the exact model and era of when it was made. Also if anyone would know an approximate value I would be interested in any information that could be had when it comes to this weapon.

Thank you gentlemen.

Regards,
Jay