I had one of those Ferguson 11.5" B&W sets[1] that were common in the UK in the 80s, it was very hit and miss. [1] https://i.ebayimg.com/images/g/s4UAAOSwmTVfU

I had one of those Ferguson 11.5" B&W sets[1] that were common in the UK in the 80s, it was very hit and miss. [1] https://i.ebayimg.com/images/g/s4UAAOSwmTVfUWyM/s-l1600.jpg https://i.ebayimg.com/images/g/s4UAAOSwmTVfUWyM/s-l1600.jpg