105.012 case differences?

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When I look through Moon Watch Only, it states that for all the pre-moon watches have the same case of:

"Type B1 - Asymmetrical, Twisted Lugs"

But I thought that there were discreet changes between the -63, -64 & -65 and later 145-012 -67/68 case designs? Can anyone confirm this and what year there was a design change in the case?

Thanks.
Edited:
 
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There are subtle differences depending on the case-maker. A forum search will yield some threads on the topic.
 
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Look for threads on CB vs HF cases. Sometimes it’s easier to search using google.
 
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Agreed. OF search is quite limited. Google seems to work much better.