#1M - Miller #1 (Standard thickness). Center Draft Circular wick (1 7/8" flat x 7 3/8" long, 1" diameter center draft tube, 0.073" thick).

Juno #1, No 1 Rochester, No 1 Trenton, Yale, Haida and Bristol, Meriden Bronze Co Junior Bristol, Miller's Vestal #1, Miller "Ideal" No. 1 Student Lamp,  #1 junior Royal, B&H No.1 Junior and others with a 1" draft tube but require a thinner wick.