USED
Removed from some vintage radio receiver equipment.
Tested (wet rub test and the ‘sniff’ test – formaldehyde odour) and confirmed as Bakelite material

UNIDENTIFIED MANUFACTURER – Male Plug
Circa 1950’s based on the equipment it was removed from (British made too!)
Material: Bakelite (Dark Brown)
2 pins
Male
Arranged in a row with a rectangular base – one pin is “fatter” & longer than the other.
From memory, this type of plug was used to connect the loudspeaker transformer mounted on the loudspeaker basket, to the amplifier power output (impedance matching)
Larger Pin is 3.1mm diameter x 14mm length
Shorter pin is 2.25mm diameter x 10mm length
The different diameter pins mean that this plug is “keyed” to the socket i.e incorrect insertion orientation into the socket is not possible
The pins are HOLLOW, this is because the method of attaching wires is as follows:
Strip back the insulation, insert the wire from the rear of the socket and ‘sweat’ solder into the pin at the front end of the plug. Heat from the iron is not an issue because Bakelite withstands much higher temperatures than modern ‘standard’ plastics – the pins will not become misaligned while you are soldering.
It looks to me as though the body is entirely one piece, I could not see a way to get ‘inside’ the plug.
DIMENSIONS:
Length of the plug is 14.75mm
Width of the plug is 6.75mm
Total length front to back (including the pins) is 20.2mm
COSMETIC CONDITION:
USED
CLEAN
Bakelite body has NO cracks or chips
NO discolouration
I have carefully removed any old wire strands from inside both pins, leaving the pins hollow and ready for insertion of new wires.
The pins are shiny and clean, not oxidised!
This plug has now been completely sealed in a clear plastic packet, awaiting the new owner!