Thanks for sharing @halcro , this is a first scan of the original manual with round shape stylus holder on LEVEL II i have ever seen. Actually i have those styli including the same rounded Ruby. Same rounded styli holder comes with all F8 cartridges, probably the first bunch for LEVEL II was supplied with the same shape then. Do you see any date on the warranty card or manual? Interesting. The date i have on mine is 1984. (Wow, the date on my warranty card, as you can see, is actually Sep.24th, 1984 ... which is today but 35 years ago! :)
But please look here and you will see rectangular shape of the latest Grace LEVEL II Ruby stylus, different than yours. Probably it was an improvement for the latest production line only. I have also several sealed NOS RS-8R EXP (experimental) original styli for LEVEL II with Ruby cantilever, the Ruby and Sapphire cantilevers in RS8 EXP series looks smaller in diameter (lower mass). They are rectangular just like this Boron. The plastic holder is not red but white, just like this super rare sapphire model.
So it is obvious for me that Grace made an improvement and changed the styli for LEVEL II in the 80’s (at least since 1984).
But please look here and you will see rectangular shape of the latest Grace LEVEL II Ruby stylus, different than yours. Probably it was an improvement for the latest production line only. I have also several sealed NOS RS-8R EXP (experimental) original styli for LEVEL II with Ruby cantilever, the Ruby and Sapphire cantilevers in RS8 EXP series looks smaller in diameter (lower mass). They are rectangular just like this Boron. The plastic holder is not red but white, just like this super rare sapphire model.
So it is obvious for me that Grace made an improvement and changed the styli for LEVEL II in the 80’s (at least since 1984).