Spanish

MS-010

MS-010

Spark key used in airplanes, understood to be manufactured by S.G. Brown (U.K.) Shown with the lid removed.

The lid holds inside a “tommy bar” for screw adjustments and has a mica disc on top acting as a window through which the spark could be seen.

Marked R.A.F.  REF. 1969 (c 1918).