A couple files that may help, especially conversions for a number of old stamps, or similar to old stamps.
CraftoolConversionChart s.pdf
#90 1961 Craftool Leather Stamps.pdf
What is the model number of the machine? A picture or 2 could also help members identify your machine and be able to provide you some help. Lots of old black singers around. Not all the same model.
OP has been warned and placed under moderation.
I believe advertising, accepting payment, money transfer, not shipping fall into the classification of mail fraud. You can pursue this with the Attorney General for the state he lives in.
@AllStitchedUp You are on notice.
Could be an expensive shipment. This is a world wide forum. So you are saying you would ship free to Europe, South Africa, Australia, South America, etc.
This is a world wide forum. Shipping anywhere for free? Pictures of what goes with the machine would be helpful.
See the marketplace rules here https://leatherworker.net/forum/forum/70-announcements/