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[John King]

You might enjoy this page, John. http://redhill.net.au/d/i.php

I misremembered the IBM ZX, it was the second 10k drive, not the second 15k one. Details here: http://redhill.net.au/d/139.php

Good stuff, Tony. However, my drive predates all of these!

Try here:

http://www.minuszerodegrees.net/5170...0_hdd_type.htm

Scroll down to the "Type" table. Mine is a Type 13. Dates from around 1982-1984.

@Tannin Here's a photo. The HDD next to it is a "modern" Maxtor 80 GB drive ...