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The Research Machines 380Z was an early British microcomputer, released in 1977. Unlike many other early microcomputers, the design was industrial style, a hefty metal box, sometimes described as 'built like a tank'; a good description can be found here: https://www.pinterest.co.uk/pin/658229301760799838/

It is said to be rack mountable, though the width has been given at 59.5 cm, which is 23.4 inches; I thought a standard equipment rack was 19 inches wide?

One thing I have not been able to find is a figure for the weight of the machine. I imagine it must've been quite substantial, and not necessarily easy to carry with those thin handles.

How much did it weigh?

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It is said to be rack mountable, though the width has been given at 59.5 cm, which is 23.4 inches; I thought a standard equipment rack was 19 inches wide?

Not really. It's a bit wider than 49 cm or 19 inches (*1) as shown here:

enter image description here

So it's safe to assume that the 59,5 you found might have been a typo.

One thing I have not been able to find is a figure for the weight of the machine. I imagine it must've been quite substantial,

While I can't answer the weight part exactly due a dead battery, I did a quick comparison with a beer case (17 kg) and it did feel rather similar. Plus at least another ~2 kg for the keyboard :)

More as soon as I get a working scale.

and not necessarily easy to carry with those thin handles.

Oh, they are, like with any 19 inch, really helpful and make moving it rather easy.

*1 - Yes, I own a tape measure with inches. I got it a few weeks ago in England, they still have them.

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    Here in Canada, our tape measures also have both metric and feet/inches, because the U.S. is such a big customer for our lumber industry that we cut to their measurements. – ssokolow Oct 30 at 0:30
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    @ssokolow Well, it was just meant to poke a bit fun of them, but yeah, lumber is an interesting area even here certain sizes are still deep down based on old sizes. For example basic batten size is 24x36 mm roughly 1"x1.5" when including the blade size. Regarding England, I need to be fair as they really made the move by now almost universal - with the exception of road signs that is. – Raffzahn Oct 30 at 0:58
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    It'll come in handy for measuring DEC memory boards... – another-dave Oct 30 at 1:46
  • @Raffzahn Milk and beer can still be bought in pints. – Neil Oct 30 at 12:49
  • @Neil Last time (two weeks ago) I visited a Tesco, it had everything marked in liter - even the pints (0,568l) :)) – Raffzahn Oct 30 at 13:05

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