Chainsaw Repair

The black partner you are calling is the one that has silver tag and just partner 5000 plus with black handles and writing right?  It should be the older one with 3 bolt hole cover. 
The Pioneer/partner one will have grey handles and writing. I am guessing this one is the newer one with 4 bolt hole cover. I dont recall my dozen or so in the past having a black tag, but then again I could have just overlooked it.

I'll see if I have a rear tag shot of my first 5 of them I had.