Here is a minty model 10 (M10) magnesium tonearm taken from a Model 10 SME TT. This tonearm is unique in that it was only supplied with the Model 10 deck and it somewhere between the 309 and the IV and V, using the the same VTA adjustment available on the SME IV and V tonearms. The big difference, however is that this tonearm does not have the usual adjustable mounting plate, so this arm is probably best for a DIY table or something. You could install this in any SME mount but you would not be able to adjust overhang easily. I hope this makes sense. Please see pic of base.
Let meknow if you have any questions or offers. I will cover domestic ground shipping if you can mark paypal payment as "personal" to avoid fee (or add it on your end). Check, MO and local pick-up also welcome.