OHLSSON & RICE (O & R) "GOLD SEAL" 1938 MODEL AIRPLANE ENGINES, LOT OF TWO, each cylinder case bypass vertically embossed "OHLSSON", cylinder head with six large fins over five small fins and a finned head, colorless and an amber plastic "Beehive" elongated fuel tank, one example with a brass intake and remaining with an aluminum intake, back of crankshaft impressed with serial number including "J2425" and "M3396"; each fitted with an Ohlsson spark plug. Each example's crankshaft turns freely and each is untested for functionality. 1938. 3 1/2" to 4 3/4" overall.
Literature: Parallels Dannels - American Model Engine Encyclopedia, p. 176, fig. 5.
Provenance: From the collection of Fred Kaiser, East Sandwich, MA.