What is it, you ask?  Why it’s a device for controlling the position of a pointer on the Telecalculograph, of course.  A mouse, as we fashionable young things might call it.  The ‘ball’ area is for resting your hand apon, and the ‘antennae’ are for clicking on, I believe.  It is The Bug, by Mr Hildebrandt, and a fitting accompanyment to the Telecalculograph computer mod that we featured a while ago.

Mr Hildebrandt has a thourough post on his page, Jake of all Trades, on the various parts that went into it, and indeed comments on the comfort of the peculiar device also.  Ever so distinctive and pleasantly brassy!  Very well done, Mr Hildebrandt.