Make your own " dash 1 " Find a "No dash" that has the engineering change that required the dash 1 stamping, but didn't receive it, which is why the dash 1s are uncommon. Get out your stamps and correct the factory error ! The workers did not take the time to go find a set of stamps to add the dash 1s as they were used to just producing the No Dashes, until the foreman got on their tails. Ed.