Wotzdisden [2]

an early battery charger ?

No x2.

A railway (railroad) Telegraph machine circa 1870

It is a system tester or an alarm.

The center knob is a door knob style with a key slot. Left button is a push button.

Unlock the center knob to be able to activate the push button....but for what??? Hmmmm???



Electric Choo Choo detector.

Upline or downline of station.

Spot on, Mike. :)

It is A British Absolute Block Signalling Instrument, used to facilitate the safe operation of a railway by preventing more than one train from occupying a defined section of route at the same time. This system is used on double or multiple lines where use of each line is assigned a direction of travel.

Your turn.

Your explanation was a bit better than mine.

Someone else can post a Whatzit. I haven't anything at the moment.
Mike

I got one this time...
wotzdisden?

It is a slice/sheer of a microchip under an electron microscope.

You can see the transistors.
Other than that????

Thats right, full article here if you havn't seen it before.
Its crazy small when you compare the scale to what you see...

Your turn.