It’s an early one: 12741.
“Very early 1946 CJ2A civilian jeep, the following replaced or overhauled. Steering box and column, seats, windshield assembly, wheel rims, gauges, fuel system, cooling system, charging system, 12 volt conversion, hydraulic brakes, floor mat. Built first week or two of 1946, converted to floor shift, still has column shift transmission and original body. ”