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beamcurrent · 17th Mar 2021, 8:54 pm

The Knob disk was used on the Marconi MkIII series cameras from the middle 1950s as an indicator for preset controls. http://www.tvcameramuseum.org/marconi/mk3/bd687p25.html there are 4 presets in this drawing of the CCU R26 to R66

17th Mar 2021, 8:54 pm	#19
beamcurrent Heptode Join Date: Mar 2008 Location: Camberley, Surrey, UK. Posts: 805	Re: Identifying unknown items The Knob disk was used on the Marconi MkIII series cameras from the middle 1950s as an indicator for preset controls. http://www.tvcameramuseum.org/marconi/mk3/bd687p25.html there are 4 presets in this drawing of the CCU R26 to R66 __________________ Regards Brian Visit the Virtual Broadcast TV Camera Museum