Thanks for the video, Snuci. (Smooth editing, too!) However, I must be frank and say that none of your otherwise quite cool vintage KBs are in the Pingmaster's league in terms of sheer pinginess.
By "ping", we mean an actual ringing, bell-like sound that lingers briefly after you've released a key. As Dork theorized, it's the IBM
6112884 and
6113442's combination of vintage T-mount Alps switches and substantial metal plate design that give them their unique, world-dominating pinginess. (But then, Ping
is a Chinese name, ha ha.)
Knowing how great these boards are, it's all I can do to keep myself from ordering up, like, 10 more of them before they're gone forever. (Well, there's the idea of staying married, too.) Don't let the shipping cost dissuade you; for some reason the seller selected Expedited Shipping by default. Standard Shipping is also available for about half as much.
That said, none of this is meant to detract from the splendour of your swell new purchase, nor any of the other remarkable boards you've shared with us. We may have gotten a bit sidetracked.