Ours (my first) was barely postwar, most closely resembling the 1948 'show' pic. No pump filter, no pump belt, wheel-to-wheel drive solenoid engaged, entire lower skirt came off. Suspension was L&R + rear coil, top/side/bottom leaf snubber. Water metering was off the bottom leaf-- weight. Single dial set wash duration and temp H/W/C. Rinse was W. Spray rinse during both wash and rinse spins. Yeh, 500RPM sounds right, definitely not 1500.