I don't remember to have seen this before: A "SP15" in the MMC-design (here mounted on a Beogram 1700...)

Have I been ignorant - or is this unique?

The SP15 cartridge was the first MMC20-like model. It was originally fitted to the Beogram 4000. It has the same specs as the MMC4000 and MMC20 EN

-Søren 

That's the original cartridge for Beogram 4000

I have one as well. Not that uncommon.

Thanks guys, I'm now a litte more up to date - and less ignorant

It is in the product database.Updated the entry a little!

I can remember the SP15 being a well reviewed and popular cartridge for use in other manufacturer's low mass pick-up arms such as those produced by SME.  The Gramophone in particular was fond of it, but then in those days that magazine was far less convinced by the snake oil salesmen that came along later and was just interested in listening to music rather than test discs.

Cleve