1965 Overlander 26′

Ohio | J O(I) 26 5 NNN
California | S O(I) 26 5 NNN
(I prefix for Int’l options)
(5NN suffix for double bed layout)

These examples here show the two standard floorplans. Notice the front dinette vs the front divan (sofabed) and the streetside galley vs the curbside galley, determined by whether it was a twin or a double bed layout.

You can usually tell which side the galley is on from the outside by noting the location of the hot water heater and stove exhaust vent