I'm trying to find some play meters for some Gottlieb EM machines. I found out that Gottlieb made meters that had five reels and six reels.

Does anyone know how they determined what kind of meter was used in each machine? Did early 70s machine use 5 reel meters on single player machines and 6 reel meters on multi-player machines? Or did they change from using 5 reel meters to 6 reel meters around 1970?

Also, did Gottlieb use different styles of meters from different manufacturers? I've seen some meters with slightly different style casings and some with white numbers and black reels. I'm wondering if these were OEM or aftermarket meters. But, all of them I've seen have had the correct meter decal on the top front. Thanks...

Thanks! I've seen some five reel meters on some early 70s single player machines, but maybe they were using NOS meters when they were building the machines at that time. Also, I'm thinking operators could have changed the meters around in their machines. I have about four Gottlieb machines where the meters are missing, so maybe some operators didn't want a record of how many plays were on a machine...