Over the yrs I have rebuilt & resold 100's of these 7 class we even used to put reverse on them(we always painted them gray too),they really holdup good.BUT they are a flatbed & always a flatbed which can be problems & the feet are very large & make it hard to get close to hardware.The modern machine have different plates & feet available for sewing things like holstarts ,stirrups,knife sheaths that can't be done on the 7 ,some parts are real hard to find for it too.The ser# is on the casting below the mod#
They also just have a bottom feed on them which can still mark your leather,the new style of machines have a smooth feed dog & even have a slotted plate available for fine leathers as they feed even with a feed dog with the walking feet & needle feed system.
The main reason I like to inform people is alot of times after they spend most of their money on a machine then after a few months they find out it doesn't work 100% for them THEN they call me & want me wanting to buy a machine provided I can give them what they have in the machine that doesn't workI really want to help them as much as I can BUT we have these machines on the shelf now & have to tell them we just don't have much call for them anymore.
Let me know if you have anymore questions or need any help.
Bob