Hey Rod,
Nothing serious but it could have been. Someone took one of the R-Clips out of the crane I was using to move the rear axle/differential assembly. It was there when I unloaded but gone a few hours later.
Allowed the pin that holds the hook and load to the boom to back out and thus dumped about 1000 pounds of metal in a split second. Teeth in the sprocket grabbed my elbow on its way to the ground.
Decided to regroup and finish moving everything down the hill the next day. Everything is OK though and no parts were damaged.
Like we used to say in the moving business, skin and bones grow back but scrapes in the furniture are forever.
Back on the numbers...the hull armor number was clear once wire wheeled but no trace of the month and year stamps like your track has so don't know if it was ever present. Vehicle would be about 1600 ahead of yours in the production sequence if the numbers are in true manufacture order.