Cold cathode frequency divider, 50 c.p.s. to one c.p.s. (Constructed from components purchased by Sc.M. from the P.O. Eng. Dept. for #12.10.1 and from the Natl. College of Horology for #4.12.6)
Cold cathode frequency divider, 50 c.p.s. to one c.p.s. (Constructed from components purchased by Sc.M. from the P.O. Eng. Dept. for #12.10.1 and from the Natl. College of Horology for #4.12.6)
