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Question on PG Fuzes

The "DCh" is no model designation, just the indicator of the "base section" as the Piezo has the addon "GCh" for "head section".

Have never seen a "PF". You got images for us?

I know the Chinese made a version of the VP-7 which had no SD feature.
 
I was just getting ready to report the same information. We discovered what the lettering meant while we were investigating piezo outputs of various fuzes that used that type of fuzing. I don't remember what all the variation were, but if I recall the VP-7M was an upgrade using a newer crystal. thinking about this reminds me to locate the report on piezo crystals.
 
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