Patt.30 (1920 - 1968)
Medium-Angle Batten Flood 500 Watt
1920 - 1948: Medium angle 56 degree squared edged glass reflector for axial mounted lamp. Straight-sided housing with overlapping rear.
1948 - 1957: As above but square front and conical rear construction.
Retired in 1957 as the Patt.60 had taken over it's role (from 1945).
The Patt.30C was a version with a choke fitted to run a UV (Woods Glass) lamp, which was still being offered for hire in 1968.