20ga. Damascus bore diameter

[Spin Drift]

I showed a picture of one of the three also. No, I figure there are at least a couple of hundred Dam 20's. It's a beautiful gun and gage.

[Double Lab]

I appreciate all the replies on the beauty, rarity, etc. of these particular 20's but I was really looking for measurements of bore diameters and if possible the first 4 or 5 digits of the serial numbers. Thanks in advance.