the "last hurrah" for the 78 rpm record in the us was the microgroove 78 series pressed for the audiophile label (ewing nunn, saukville, wis.) in the early 1950s. this series was labeled ap-1 through about ap-40, pressed on grainless red vinyl. today ap-1 through ap-5 are very scarce. by very tightly packing the fine groove, a playing time of 17 minutes per side was achieved. within a couple of years audiophile switched to .