To expand on what Larry pointed out:
In the Stoner manual that can be download this site
http://soda-machines.com/index.php?option=com_docman&task=cat_view&gid=94&Itemid=61 it shows 6 models (thanks Jim & Larry)
1) Senior 8 slot w/20 shelves (160)
2) Junior 6 slot w/17 shelves (102)
3) Theater model 8 slot w/20 shelves (160) with a illuminate mirror and candy display
4) Dual theater model two theater model attached at the base total (320)
5) Senior with Gum & Mint Unit & coin changer 7 slot w/20 shelves (140) and mint & gun racks
5) 120 which is a taller Junior 6 slots w/20 shelves ...quote from the manual "
The Model 6-120 Univendor is a composite machine base on both the junior and the Senior Univendor No 180 was list, so I think it did come later, I sill have to change my list of machines from a Stoner 180 to a Storner Senior
