Interesting, have a look at this link.
by Murphy 
, Thursday, December 29, 2016, 18:41 (2888 days ago) @ JD
As to when and why is anyone's guess.
A quick search on Google turned this up
http://dutchman.rebooty.com/temp/Ideal-Molds-1942.pdf
Scroll down to the .44 Cartridges and you will find it.
To me, all these years the #429215 Ideal and Lyman meant "Thompson" design.
Hope this helps,
Murphy
Complete thread:
- How often did Ideal/Lyman reuse mold numbers? -
Hoot,
2016-12-29, 14:35
![[*]](themes/default/images/complete_thread.png "Open whole thread")
- I've never seen a number reused, but there are errors..... -
JD,
2016-12-29, 18:30
- Interesting, have a look at this link. - Murphy, 2016-12-29, 18:41
- Not terribly often.... - Glen, 2016-12-29, 20:02
- Thanks guys! - Hoot, 2016-12-30, 07:42
- I've never seen a number reused, but there are errors..... -
JD,
2016-12-29, 18:30