Sentinel ME-26 D/U vs HP-410B vs Macromin Electronics

[W3KW]

So who knows the back story or history of how an HP-410B became the Sentinel ME-26D/U? Or, was it the other way around? Who was Sentinel and who was Macromin Electronics…the ME part?

I see comments from users who serviced the ME-26D/U and I’m hoping someone can fill in some historical blanks for me.

Thanks,

Wes
W3KW

[W3KW]

Also, see:

https://www.eevblog.com/forum/other-blog-specific/(restoration)-1960s-multimeter!-sentinel-me-26du/msg5617063/#msg5617063