Comment by W.B.lbl:
I know that when RCA Victor first pressed LP's in early 1950, their center label size at die-cutting was 103.5mm (4.0748"), a size which was more or less used on their 78's from the mid-1910's (around the time the "batwing" label design was first introduced) to about 1920. When pressed onto the record the label size was shrunk by ~0.65%, to approx. 102.83mm (4.0483"). Would I be close in the label measurements here as on {Images #3533688 & 3533689}?