I had to solve a wee problem with this one, it had a broken third wheel upper pivot, which carries the sweep second driver. The pivot was broken off inside the driver wheel, so I had to carefully push it out as well as source a new third wheel, and as luck would have it, I had one NOS. I know we had some interchange books listed here, but I wasn't able to find them, maybe I'm not looking correctly? Also, the one I have on file is from 1952 so doesn't help with the later movements. The 11ALACD has roots back in the 10BZ series, as well as other 11 series, but sometimes the pivots are slightly different, as I discovered. (.15 mm as opposed to .13 mm)
Anyway, if you look at the pics, you will see the gasket is missing, I am still trying to find one, it is flattish and wider than other models. The one that was in here was completely destroyed, and had allowed sweat to enter (or more likely, sweat entered by wicking up the stem) which corroded the brass parts to an amazing degree with that blue/green verdigris. There was decayed gasket pieces and dust, as well as green verdigris literally everywhere in the movt, and if it hadn't stopped, it would have caused some serious wear and tear. Only one service mark inside, not great for a watch of this age. I am enclosing a before pic, usually I forget to take any. Movt and case both stamped M6, so 1966 Aerojet would be my guess. The dial is virtually mint, and the Tritium still glows for some reason.
There are also interchange books from 1963 and 1971. The case parts book could help you with finding the correct gasket. Do you have a case number stamp on the caseback inside?
Model looks to be either the Aerojet E or F. They look the same, but have different bands. There is no mention of dial color, as sometimes we see these with the champagne color or a silver color.
In reply to There are also interchange… by Andersok
I'm not seeing any Interchange books past the 50's, Is there another section for this? The gasket I'm not worried about, I have thousands, it just takes time to sort through them unfortunately. There is a case stamp, I'll have to check it when I get back to the shop tomorrow.
In reply to I'm not seeing any… by Reverend Rob