--Extel the PA system used at the time gave off/results ....
Extel, now that's a term I haven't heard in many years, I will revert....
Those were the days.... men were men and men gathered in those dark, dirty, smoke filled mysterious wonders with blacked out windows and gathered round a speaker through which some burd relayed such exciting information as betting shows and stumbled through repeating course commentaries. One of my fondest memories was when the favourite was announced as the winner of a particular race in the UK prompting many men to join the payout queue... then after a few minutes had passed she says "correction to the result at..." provoking immediate, in some cases rather ill-tempered, disgruntlement. No explanation as to how or why she got it wrong! Another one was a somewhat inexperienced board marker's interpretation of being told through the speaker that there were no non-runners in a race at Navan. Navan (race time) they all go 7s was the message, the young lad's response was to chalk up a non-existent opening show with all seven runners priced at 7/1.... still managed to back a loser, albeit at a great price but a price the bookie probably wouldn't have stood over anyway as it was clearly an error... all good fun though!
Then came SIS audio followed by TV... it was all down hill from there... bright lighting, toilets, coffee/water machines, pretty burds behind the counter, etc...