I searched various places online and called Marco specialties looking for a flipper coil stop for my 1966 Williams Hotline machine . the one that showed as fitting my machine is out of stock but I don't even know if its the correct one as it does not look like the ones that are on my machine. Also I think it was generic as my machine was not on the compatibility list. Any way, can any one tell me which stop I need or point me to a supplier that can help me ? Thanks / Chris in Winchester, VA