[40 Deluxe]

There are questions: How long did it sit at the assembly plant before it was shipped? Was it ordered by the dealer with the options he wanted and then sat on his lot until sold, or did the customer fill out the order, specifying what color and what options he wanted and then waited for it to be built? That took some time, maybe a month or two. If the car was an unpopular color or such, it may have sat awhile. I don't know if was a buyer's market or seller's market in mid-'51 but that would affect how long it sat on the dealer's lot, too. So your car could have been built earlier in the year.