I took a look this morning and the serial number is SK131054, so from Tony's website, "SK130920 – SK144902 = 1976 – 1979".
You seem a friendly bunch so I'm going to take liberties here and post some more photos of all the 'bits' to see if you have further guidance.
First item, as far as I can make out, is possibly a milling attachment, or maybe a standalone machine?


Then there are all these, I've no idea if they're attachments for the lathe, milling machine or some separate machine entirely. I guess there is some value to the motor at least?


Then what I guess are tooling and bits for the lathe; cutters, reamers, chucks etc. From my basic knowledge, researching online the drill chucks can be ~£50, chucks ~£200-400?


That is one photo, but there are also boxes of stock material and so I had to create a shared album, there were just too many photos! haha
https://photos.app.goo.gl/QVL6uGF1a51MFW4U9
Thanks for the link to Tony's website, Dave. I spoke to him this morning and he was very friendly and informative 
Edited By Ben Morgan on 14/03/2020 12:42:09