Crown, 2nd Model(M-52), #10, Separating Zipper, Interlocking, Sage Green Tape, NOS Crown 2nd Model was developed in 1944. The developed design was unique, taugh, and smooth. This bottom style superseded early style around 1957-58. And this Interlocking(Automatic Lock) slider also superseded Spring pinlocking slider in 1952.
Manufacturer: Coats & Clark Corp.-Crown Fastener Div. Year of Manufacture: 1952 Zip Type: • Separating Zip Teeth: • Width: 9.2mm, #10 • Material: Die Cast Zinc mainly Zip Tape: • Width:19mm • Color: Sage Green • Material: Cotton 100% Zip Slider: • Interlocking(Automatic Lock) Zip Retainer/End Box: • Die Cast Zip Length:78cm Various Purposes for Repair: • MA-1, N-2B, N-3B....M51 (1954)