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Old 13th Apr 2021, 10:10 pm   #8
jamesperrett
Octode
 
Join Date: May 2007
Location: Liss, Hampshire, UK.
Posts: 1,330
Default Re: Anyone know the date range for these old batteries.

I seem to remember the design changed in the late 70's to add silver borders around the blue parts as shown in the picture at

https://www.pinterest.co.uk/pin/17381148541515093/
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