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Old 12-06-2015, 10:57 PM
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Electronic M Electronic M is offline
M is for Memory
Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 10,187
Originally Posted by David Roper View Post
This is the type I grew up with:

Parents and grandparents both had several blankets using that type of control. Note the power plug. The absence of a large flared surface at the point the blades come through dates it to sometime prior to the mid 1970s; anything later would have a more modern plug. Also, a polarized plug almost definitely means 70s or later.
A notable exception to that polarization rule is Sears...TVs I have a 1963 roundy and a late 60's Japanese portable, and both have polarized cords and interlocks.
Tom C.

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Reading between the scan lines since the mid 2000's.
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