Volute No. 1 has the speeds of Time to 1/150.

Volute No. 2 has the speeds of Time to 1/100. 

Volute No. 3 has the speeds of Time to 1/75.

References:

Premo Cameras, Rochester Optical Co. (Rochester, NY, dated 1907, p.52
Milwaukee Photo Materials Co. Catalogue No. 5, Milwaukee Photo Materials Co. (Milwaukee, WI), undated c.1907, p.31
Photo and Art Supplies, American School of Art & Photography, Scranton, PA, dated 1907, p. 37