Quoted from Geofflove:I've just picked up a nice condition Bronco. However, it has no chime unit. From the inside it appears there never was one - no holes, cut wires etc. Was this an optional extra on some of these? I'd love to fit one if I can find one...
European exports did not always have a chime unit, so yes, for some markets they are optional...
I do have a spare chime unit should you want to take on this mini project. Normally there is a dedicated set of contacts on the scoring relays, curious to see if the contacts are there or will you need to augment the relays with these. As well as a separate 4 position jones plug and then extended harness. Some work but not too complicated. (I could kit it up for you including the extra contacts and stack screws etc))