Ah, the Cosim vario. I did all my Silver C and first competition with one

as my only vario. In answer to the question, put it on e-bay with a
heads up on this site, and you will find out.

At 18:32 20 December 2017, wrote:
I have a NOS COSIM Variometer for sailplane, gliders and it was
manufacture=
d by Cobb-Slater Instrument CO., LTD., Matlock, England in the 1940
and
196=
0. It's a pellet type of indicator in a bakelite brown enclosure, it
measur=
ing unit is ft/sec, a red pellet for downward and a green pellet for
upward=
movement. It would be appreciated if someone knows what this
variometer
is=
worth. Thank you