CZ93X62
Official forum enigma
Knocking on wood here......I have owned one each of Lyman 45, 450, and 4500--and none of the three have shown these 11 o'clock or 1 o'clock lube body cracks. The 45 left some years ago, the other two are on my bench today. The 450 (1981) has the 2-O-ring piston, as does the 4500 (2010).