You know/remember if there was any smart coding in the casting numbers? EXAMPLE: 1st so many numbers were the casting plant...
Trying to track down any info on a block and noticed the 1st 4 casting numbers of the block (3577430) happen to be the same as the 1st 4 numbers of the 340 TA Block (3577130TA).
Please advise.
One way to estimate the production of D5 blocks is that all of them seem to have the same casting date (Jan 19 1970). The few casting times I can find (on your block and a -2 block, see pics) show the same, noon. Also found a picture of another -2 block, also cast Jan 19 at noon.
Tomkelly: How many blocks were usually cast in a batch?
