That canister should have the full-size Lamb motor. Panasonic used a factory-supplied (Matsushita) motor, but only the canisters with the "Panasonic" name on them, like the V9644.
If it were the canister with the 2 prong hose (ON/OFF on the canister itself), then it would likely have the cheaper one-stage Amatek (loud) motor.
Later on, the Kenmore Progressive and Panasonic V9658, for example used the same exact motor.