Markings ID

[J. Melvin Moore]

I have a 10 gauge serial # 5500. On the water table is the serial # with an X above it.
On the barrel flats is T then 46, then 6682, which I assume is the order number, with 14 stamped at a 90 degree angle to the order number.
The locking lug has the serial number in 2 places with either 5 0 or S 0 on the bottom of the lug. Any ideas?

[Bill Murphy]

Please post pictures. A gun with a serial number lower than the order number is a bit unusual.