Promo machine
The 634 was introduced in response to Hoover delaers wanting a "Sale" machine.
Previously there had been no such thing as a sale or bargain price for a Hoover, and dealers wanted something they could advertise as a special.
Model 634 was made from January 1955 to January 1956.
This was basically a dressed down model 63, half bumper, slide top bag, an an agitator with a slightly smaller diameter than the 63. I believe these used the canoe style brushes too.
One fun fact is the 634's cord, it was black, and featured the older larger clip on plug, not seen since 1953 when the 29/62 were dropped.
The 634 was available for that one year in limited quantities to dealers, it was supposed to bring customers into the stores, so the dealers could sell them up to the more deluxe model 63.
There were just over 66,000 634's made.