ok, was that cryptic enough 8-)

Just this week I have purchased two vintage machines, a 301A and a 201-2. While fondling my new toys I have found numbers, almost in day-month-year fashion in hidden spots on both of these machines.
On the first one, I thought maybe a service center dated some work they did but when I found the same style of numbering on the second machine....???
Both machines were purchased 150 miles apart, the odds that they were in the same service shop is a bazillion to one as I live in the Seattle area.

Anyway, on the 301A number is under top cap written on metal. It's written exactly as: 6-22-7
On the 201-2 is written on the plated head cover (?) as:
4-29-7

Anyone have any thoughts on these numbers? I'm baffled.

Oh, forgot to mention, looks almost like they were written with a small sharpie, black permanent marker style

I have seen those also on the later machines that were made towards the tail end of the 50's and in the 60's. They do look like dates in a way but all the ones I have seen have not been legible.

Billy

Could they be replacement part numbers rather than dates?

Not part numbers I can tell you that because of the spots that they were written and they are all hand written.


Billy

Interesting....

One machine dates to 1938, the other mid 50's.
It's the tidiest of writing. I'll post pictures later today. Did they have permanent markers back then?