Having another ‘bored’ moment at work today…..

When were re-usable portable flashes introduced?

Lets assume that it was before the mid 60’s. Lets also assume that it is indeed 1965. I have just purchased a brand new Koni-Omega Rapid and have decided that its finally time to ditch my bulbs. What flash would have I more then likely purchased with my Koni?

Cheers