My 1934 Leica III kit contains a mid-1960's Toshiba "linear" CdS meter... vfairly compact for a hand-held, and similar in form and function to a Gossen Luna-Pilot.
My other "good" meter is a 1960's Gossen Luna-Six. version 1.
I have dozens of other meters - several Weston bakelite "bricks", in varying forms of function, Weston Master I, II, III, IV, V... several old Seikonics of varying models, the old metal GE DWY meters, the GE PR-1 (seem to be pretty reliable), several shoe-mount meters ( Walz, Leitz, etc) - all of them dead, couple of Norwood "Directors", and a Soligor Spot-meter.
Generally, when I'm shooting with my Barnack, I'll get a baseline reading from the meter, then use my head until the light or location changes.