How often did Ideal/Lyman reuse mold numbers?

by Hoot , Diversityville, Liberal-sota, Thursday, December 29, 2016, 14:35 (2824 days ago)

I'm looking at an Ideal mold numbered 429 215 and I hopped over to the Ol' Buffalo Mold chart and it bears no resemblance whatsoever to the bullet shown. The mold is round nose, plain base where the chart (and Midway and Lyman.com) show a SWC with a gas check. I recall reading that Ideal and Lyman reused numbers on occasion but was curious as to how frequently that happened.

Thanks!