9204 Booster Question

[6667ss138]

I have always assumed that my power brake booster was the original for my car. My car is a 69 Z/28 built 07A, I decided to take some close-up pictures and the 9204 and 110 date look correct but there are some other numbers stamped as well. The 110 date was April 20th, 1969, which was on a Sunday which seems odd. Most all of the original components on my car are all dated May and June so the late April is a possibility, I guess. Has anyone ever seen the extra numbers stamped like this before?
Sorry for the upside-down pics, I tried to flip them but no luck. Any thoughts or opinions on the stamps are appreciated!

[jeffschevelle]

See here: https://www.camaros.net/threads/9204...12/post-434954

which says 8519 is a 68 Firebird w/disc brakes. The big font stamps are also pre-69 format I believe.

So I would speculate the shell started life as an 8519 dated 048 (of 68), which did not get shipped out from the Delco Morraine plant for some reason (maybe failed QC test and got laid aside), and then the shell got repurposed into a 9204 dated 110 (of 69). You would think they would have ground off the old stamp somewhere in the process, but apparently not.

[6667ss138]

Thank you, Jeff, that makes sense. Also, I've read that when they were finishing up all the July of 69 cars which was right before the one-month shutdown that they were using up all extra inventory as they were expecting to begin the 1970 when starting back up in mid-August. So, I guess it's possible they were making whatever they had work that was lying around to clear out parts inventory?? I think the shutdown was from July 11th to August 11th, 1969. My cars official production date is July 10th so one of the last cars built before the shutdown. Much appreciated!!