From the Tenth Edition of the Springer's Handbook of North American Cinderella Stamps Including Taxpaid Revenues, Page 20.

1893 cigarette stamps overprinted in black "Tax $1.00 per M/CIGARS/ACT July 24, 1897"

For those who do not know what "M" stands for is 1,000.

Rouletted 5 1/2

For years there has been two different measurements of roulette 5 1/2 and 5 3/4, does any member have factual background information which measurement is correct?