I've had this pre kicking about for a while purchased as a lucky-dip on ebay, I could hear it had decent quality but found it to be neither 'fish nor fowl' insofar as it always seemed to kick out a bit too much gain for mm and not enough for mc.
So I finally got my old man to take a look at it for me and make some adjustments to both the input and output stages which are switchable with the microswitches. It now has a 15ohm input as well as the 47k and range of attenuations on the output side.
Here's a rough schematic, I'm interested to know if anyone knows where it comes from as we've been unable to find anything else exactly like it online.
I've manage to spin a couple of sides through it since I got it back and it's sounding good but I've not had enough time to form a proper opinion yet or to compare it to the other pre-channels I have access to.