I've tried to research it, I learned a lot about the Colson bike company but I can not find this exact model referenced anywhere. I talked to a historic library in Ohio and they may have the sale catalog that contains this model but it's not digital so they said I could only view in person. The item "Antique Colson lever hand controlled velocipede wheelchair bike 1930's vintage" is in sale since Monday, November 25, 2019. This item is in the category "Antiques\Other Antiques". The seller is "adaptstl4lkx" and is located in Saint Louis, Missouri.This item can't be shipped, the buyer must pick up the item.