[427king]

The only other possibility is it was a virgin pad block and stamping was added later by someone that wasnt up on date codes,just casting #s.Ive seen that many times . There is a way to tell in some cases if it was an OTC block that was later stamped . Ive never seen a lead time over 6/7 months in 20 years[and ive only seen 2 that far off], not to say it couldnt have happened.In this case id say its more than possible.