Reminder to all viewing. If your cars details (year, month, options and how it was equipped) does not match Royce's exactly don't copy these markings. No reason to possibly apply markings incorrect for your car when you can simply ask about your specific needs. Often these only get shared privately to reduce these possibilities Mike,
Those are great. I wonder if you have any pics of the markings on the housing? It would I think have some kind of reference to the ratio or the tag number stenciled on or scrawled on the outside?
Remember that Mike's example is two years later.
Though I've seen some restored numbers with tag numbers written on the exterior I've not yet found one marked like that in the "wild"
Also you had a colored paper label with the axle code on it so writing might have been a bit redundant. Just a thought
Consider that some of these marks are likely (and mostly in this case) done at Sterling so those are somewhat standard across all car plants while other marks were applied at the car plants to the subassembly.
Depending on the plant I have what appears to be the second rotation number on some (San Jose cars) individual numbers (sometimes two digit) single letters, lines or checks. Starting in later 67 we start to see markings on the bottom of the housing, below the third member, being applied at Sterling plant. Though they continued with the writing on the bottom of the third member
Trying to stay as close as possible to your build period here is an example of a case cast Dec 21 67
Pretty typical IMHO from others of the period
Yellow arrow - appears to be an assemblers or inspection number Haven't seen this location or size before
Dark Green arrow - may or may not be a mark
Light Green arrow- Another assemblers or inspection number Often seen here or in the "box" the dark green arrow highlights
Light Blue arrow - Paint dribbles/runs often seen in this area from a assemblers or inspection number applied at or about where the Orange arrow indicates. As shown in the picture below. Colors range between light blue, pink, yellow and white so far
Orange arrow - covered above
Take note that on the December example we don't see the large yellow blob we so often see on earlier and later 9" examples.
Second example likely from a number of weeks later. Assembler/inspector numbers rotate around slightly but not my much. In this example from the top center to the drivers side of the case
The typical blue (missing is the yellow) yoke marking is visible and this time the yellow at the top center has returned
Must take this opportunity to thank everyone that has seen thousands of marks to me over the years - a BIG THANKS