Hi - I haven't been current on the forum lately, but I hope someone can provide a little guidance, anyway . I'm looking to buy an older Pfaff 138, and I'm wondering about the sub class, as I don't want to get something I can't use - It's a pretty long drive to get it :~) It's not a lot of money, AND, it has one of those cool "Pfaff" thread stands, so it's attractive to me because of that, anyway! It's a Pfaff 138-115U - The machine is obviously an early one, as it's black instead