1974 Datsun Full Line TV Commercial B210 710 240z Nissan

Full Line from Datsun in 1974? The Z looks like a 240, but that ended in 1973. But the B210 came out in the USA in 1974......so could that Z be a late model 73 while the rest of the cars here are 74 models? I've found one reference saying the 260z was a mid year entry, 1974.5????