Yes, stropping DE blades on the inside of a glass was common in the dirty 30s Depression. I have a green glass Lillicrap's Hone for DE blades, no I couldn't make that name up, from the UK made pre WWII. Couldn't say if that worked or not.
Bob
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Anything like this?
Attachment 311383
DE stropping tools might be a good thread. Lots of versions to win over from the straight users.
Many of them tried to imitate the straight style.