TwinTurbo:
I looked at their site, and on other sites where one can buy their gauges.
E-Bay also listed an actual Wika tire gauge, blue rubber protector arount the face, sold.
It seems one must now provide the coupling, hose, and chuck to the appropriate gauge head from Wika, to produce a complete, usable kit!
Their product looks like quality stuff, but the complication comes in my prior sentence.