The 'L' refers to the Luxary package (padded dash, cloth seats and a couple of other minor things).
The S tells you the engine - a 1302S would have the 1600 engine, where as a plain 1302 would have a 1300.
So your car is a 1302 model with a 1300 engine and the luxary package.

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Howard
1966 Beetle: VW1300.com