[Coco] Model Number Confusion

[Steve Ostrom]

I keep collecting Coco stuff, and maintain a very detailed list.  There is a 
Coco 1 on eBay right now (230503718010) that is advertised as model 
26-3017A.  This is one of the units I don't have in my collection.  But when 
I looked carefully at the enlargement photo provided in the eBay ad, the 
original RS name plate on the bottom says it is a 26-3002A model, which I do 
have.  There is a white sticker under that original plate that reads 
26-3017A. The eBay ad also mentions this sticker.  This sticker looks 
official, but has no other identifying marks other than that number.  When 
the Shack did an upgrade, did they change the model number to indicate to 
what model the Coco was upgraded?  Is there actually a 26-3017A model with 
that nameplate, or is the 26-3017A just an upgrade and never a produced 
model?

Thanks!

-- Steve --