This 1893 definitive series from the Treaty Port of Shanghai features the emblem of the Shanghai Municipal Bureau, a symbolic image of a crossed key and caduceus over the Latin motto Juncta Juvo, denoting municipal unity and service. Issued in denominations from one-half to twenty cents, the stamps were produced by typography on watermarked paper bearing the Chinese characters for "Ministry of Industry" in upright orientation. Each stamp measures 23 x 29 mm and is perforated 13½ x 14. The set was printed in an array of vivid colors corresponding to value, including orange-brown, red, blue, carmine, green, yellow, and violet. As part of the local postal service established under foreign concession authority in Shanghai, this series exemplifies early Chinese municipal philately, predating national unification of postal services. The stamps are mint hinged, well preserved, and include the full spectrum from the ½ cent to the scarce 20 cent violet. Cataloged as Scott SH158–164, this set remains a culturally significant artifact of Qing-era treaty port autonomy and internationalized commerce. Estimate "$180 – 220"