Hi Dont know much about Centecs, but i assume you mean like at the bottom of this page link which shows a machine badged /sold as a `Granville`.

**LINK**

This older centec for sale at GM also has the lever ratchet .

http://www.gandmtools.co.uk/shop/centec-2-horizontal-milling-machine-cabinet-stand-1ph-80202694/

Edited By mark smith 20 on 27/01/2017 16:35:17

Centec2's are a bit basic, you'll note on the GM link someone has fitted a cheapy digital readout to use the bolts that lock the height.

Many have been modified with various forms of screw jacks under the knee. yours is clearly original.

On the plus side gearing via belts is nice and quiet.

Nick is right about that particular 'breed' – the ones with a removable overarm – which could be replaced by a vertical head (hence the pulley on the back of the machine). The predecessor, the Centec, had a fixed overarm -so was only a horizontal mill.

They clearly had not thought about progressing the original design or they would have called it the Centec1.