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You can contact Remington directly to see if they have any parts supply left for the model 1148,or you can attend gunshows,look on the internet,pawn shops,etc.
The anchor marking is a final inspection proofmark. It has no connotation with any naval service. www.countrygunsmith.net
The 1148 in 410 ga. was introduced in 1954 and discontinued in 1969.
It's date code stamped on the barrel, see related links for information on the Remington Society of America.
To find 70 percent of a number, multiply the number by 0.7. In this instance 0.7 x 1148 = 803.6. Therefore, 70 percent of 1148 is equal to 803.6.
If it's not immediatley apparent, you won't.
It should be stamped on the barrel It should be stamped on the barrel
Usually it printed on the left side of the breech or barrel.
On the barrel.
Your question answers itself.
The model number should be stamped on the barrel just above the trigger guard.