BETSIE - the betting settler calculator
No pictures so far, I am afraid.
I was interested to see BETSIE being mentioned in the SADIE sales literature, as they are designed for quite different customers. Either BETSIE was more famous than I had imagined or the group were still selling BETSIE calculators.
At this point they were still Bismec and Systemation as two different companies. Some time later they formed BCL and simply advertised as that - with Bismec handling sales from Tottenham Court Rd and Systemation handling design and build from Portslade.