Quoted from markmon:They all dimpled the same way.
They definitely do not all dimple the same way. Depends greatly on how many layers used, and the thinness/quality of the top layer. The SP fields on the B/W stuff in the early/mid 90's seemed to have 9 ply and a very thin and hard top layer, which made dimples so faint in appearance they can barely be seen by the naked eye. Other playfields are like 5 ply and each layer looks like a sponge, and the dimples are pronounced and instant and it may take 40 years before they're all beaten flat. Believing all playfields dimple the same is a misconception.