Here are the pictures of the barrel flats and some on the barrels. There is nothing written on top of barrels and nothing on the sides of the reciever. On the bottom of the receiver is Fabrique Nationale D'Armes Herstahl, Belgiuim.
The barrel picture, with Krupp came out blurry, but had Essen Krupp and maybe someone else can make out what it has.
chokes were, right barrel .005 and left, .024.
I couldn't make out the numbers on the setting ring and don't know if they were .650 or .660. The bores were both +.012.
If the ring was .660 than it would be .672. which seems high to me, and there is a stamp between the barrels 672. Originally I thought that was the serial number, but the water table shows a 4 digit number.
The only information in the Blue Book was the two proof marks; Crown on top of oval, since 1893 and lion over P.V since 1924.
This also has the 16 over C in a diamond like Larry stated.
