Handy link, sorry for late replies everyone..thank you.Honestly Reynolds were very very cagey about 653, there is almost nothing written down - and even less on the internet. My info is from a niche book published in 1990 which is hard to find these days!
https://www.abebooks.co.uk/servlet/...up=on&sortby=17&cm_sp=snippet-_-srp0-_-title1