Vintage Blue Enamel PO Box Lock Mechanism with Number Plate 5625ntage PO box door

Vintage blue enamel-finished metal lock housing with an ornate Greek key border and star-shaped letter dial (A through H markings) on the front, with a chrome push button and turn knob. The front plate shows the number 5625 on a white card. The back/inside view shows a brass lock cylinder, brass bolt rod, and blue painted interior with exposed brass hardware and some wear and paint loss. Appears to be an old mechanical lock or call/indicator box. Condition of internal mechanism, whether it operates, and whether a key or original parts are included are unknown - check before purchase. Sold as shown.