OEM Original NOS Indian Motorcycle CHAIN ? Trailblazer brave 149 arrow

2 New Old Stock chains for an antique Indian Motorcycle.  I do not know which Indian model these fit.  This was bought in a pile of NOS parts and I do not have a parts book to decipher the part #.  Most of the parts in the pile were for late 50's smaller models. Also, there are 2 chains in this package.  You do get both.  Each is approximately 21 inches long
Approximately 60-70 years old. Sold as is.