The square holes in the coins are somewhat primitive looking

One of the coins has a crack in it, see photos for more detail

The coins pictured are the coins you will receive.

Vietnam (Annam) Phan ND (1820-41) Minh Mang

Empire of Vietnam

Emperor: Minh Mạng (1820-1841)

Years: 1822-1841

Value: 1 Cash

Currency: Cash (970-1945)

Composition: Brass

Weight: 3.75 g

Diameter: 25 mm

Thickness: 1.1 mm

Round with a square hole

References:  KM# 182

Obverse: Four Chinese ideograms read top to bottom, right to left.

Script: Chinese (traditional, regular script)

Lettering: 　明

寶　通

　命

Translation: Minh Mạng Thông Bảo

Minh Mạng (Emperor) / Universal currency

Reverse: Blank (uniface).

Edge: Smooth.