870 Age Question

[scottjc]

Hello, I recently acquired a 16 ga. 870 with a plain 28" modified barrel. The barrel markings on the left side are S B 60. I can't make that combination of letters work with the commonly published aging chart. The serial number is S012529W. This is a Remington barrel, but I have no way of knowing if it is original to the gun. I know someone here will have the answer.

[Virginian]

The serial number correlates to 68 to 74 manufacture. The barrel code is meaningless, as you noted it does not match with anything charted. I would guess 1968 based on serial number.
Not having a valid, or indeed any, date code is not unusual. I have three Remington barrels with no date code. I did have four, and two come new on the guns.

[scottjc]

Thanks for the response. I knew I would get some help here.