: Located on the flat portion of the receiver where the barrels meet the frame (visible when the action is open). Barrel Flats

However, some early Model 600s had the serial number stamped very lightly on the barrel lug, and after decades of wear and cleaning, it may appear invisible. Use a bright light and a magnifying glass. If you truly find no number, you may have a pre-1968 prototype (unlikely) or a gun that had its numbers illegally removed (more likely).

Understanding your Ithaca SKB 600 serial number can significantly impact its value. Factors such as:

: Community-maintained databases often have the most accurate "survivor" data for matching serial ranges to purchase receipts. current market value of specific Model 600 variants?

. Understanding its serial numbers is key to determining the age and specific variant of your firearm. Serial Number Location and Format The serial number on an Ithaca SKB 600 is typically found in two primary locations: The Receiver Tang : Visible when the top lever is pushed to the right. The Water Table