`70 Disc brake M.C lid differences

[Rixls6]

I have 2 original Delco master cylinder lids, one from an early (dated 1339), the other from a later (June 70) build.

There are slight differences in the 2 lids and wonder if it IS an early VS late thing, or just supplier variances.

I do know that the very early `70 Chevelles got the `69 style disc brake master, but obviously these are from the rectangular design.

Center bar differences.
http://i36.photobucket.com/albums/e43/Rixls6/70Mastercylinderlids002.jpg

Font and shape differences.
http://i36.photobucket.com/albums/e43/Rixls6/70Mastercylinderlids005.jpg

[smoke' em II]

ttt.... <<GRAEMLIN_URL>>/burnout.gif

Rick, I would like to know the reason for the difference as well? <<GRAEMLIN_URL>>/dunno.gif