While the selection of themes adopted by the manufacturers became ever wider, the fundamental mechanics of these old machines remained much the same for generations. While the majority of them had three reels, designs were evolved which meant that some good slot machines had four, five and even six reels in play. Images of these became synonymous with UK casinos.

There is without doubt that their popularity was due in no small measure to the hypnotic effect of the spinning wheels - which is why this formula is still among the most popular forms of gambling today, among both punters as well as the machine companies. Lots of people mourn the passing of the old one-armed bandits, and their enduring popularity is shown in the proven fact that many old machines can fetch large sums on auction web sites, and they are increasingly sought-after as collector's pieces.

The very fact that the machines also involved some physical effort on the a division of the player also added to their appeal.