Looks like all those codes are from a block?
950 = ??? (I have never seen a meaning/translation for that type of code : I have seen 850 and 950))
CON4 = CONveyor #4 in the casting plant
J 19 0 = block casting code
J = 11
19 = 19th
0 = 1960 (if it is a 261, or a high-pressure 235) -> from an earlier post, it is most likely a 261
