The wheels.

some interesting details on the car's wheels...

Looking in detail at the car's wheels proved interesting. To the casual observer, they were all the same. EXACTLY the same from the outside, with the same original paint, same degree of chipping and degradation from the years, same 'wide slot' ventilation slots, but there are interesting differences. Let's start with what is obviously the oldest (in terms of production at the Rubery Owen factory in the UK). Riveted construction...

↑ This is the back of the rim (uncleaned!) clearly showing the rivets and the large cooling vent that make early wheels instantly recognisable.

↑ All 5 wheels carry this RO stamp, indicating Rubery Owen was the manufacturer.

↑ These are the two other stamps on the 'early' wheel. The first, 11, indicates the steel gauge used in making the wheel centre. All 5 wheels have this stamp.
The second, R6D is what I hope to understand more in future, because...

↑ ...the other 4 wheels are spot-welded, not riveted, which apparently happened after about September, 1961, and...

↑ ...these other 4 wheels have different code stamps, including this one. One of the others is R8E, and the other two R12F.

It is interesting to see how parts were simply randomly selected from the UK-sourced stockpile during assemby, and how suppliers (Rubery Owen in this instance) were constantly making adjustments to production.