Matchbox Superfast 3 x Bowater's Printers Proof Cardboard Box Containers From PS-1 Container Port Play Set - (1) United States Lines; (2) OCL; (3) N.Y.K. Worldwide Service - all are signed off in black ink on 1 end flap with Works Order No. COL 52522/6 but unfortunately un-dated, all 3 proof boxes have a full set of print registry numbers 1-50 on 1 end flap tab - Good to Excellent with some staple puncture holes & minor staining. Unique historical items. (3)