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Old 31st Oct 2018, 7:27 pm   #3
midshires
Triode
 
Join Date: May 2007
Location: Northampton, UK.
Posts: 36
Default Re: GPO 332 mk1 with modifications

The S58 markings indicate the internal sub-assembly was made by Siemens Brothers in 1958. So yes, it is a home-made assembly of odd parts. The wiring looks like a rat's nest (sorry!). It would have been bundled with lacing cord had it been an official modification.
Andy.
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