Very rare speed controller for BBC Micro Computers, Commodore 64, ZX Spectrum, Amstrad etc.

Made by NIDD VALLEY MICRO PRODUCTS Ltd, England.

These have a 40-pin IDE connector that can be plugged in directly to some of these systems or adapted to others.

There are two units available. Both are untested and sold as is, but present in Very Good condition.

Pickup from Hobart TAS or Domestic and International Postage available.

For more info on what this does, see this video: https://www.youtube.com/watch?v=PKZuPom7ksk