Coin 1928 year of release

This year, in the USSR, the stamping of coins of all denominations continued with a vengeance, with the exception of the fifty kopecks and the ruble. Their release has been discontinued. This year ends the minting of coins worth half a penny of copper. The coins were identical to those issued in previous years, except for the year of manufacture.
Among them are rare specimens - 3-penny coins of aluminum-bronze alloy with elongated letters "USSR", and coins of 20 kopecks of silver with round letters "USSR". Coins ½ penny are also rare.
In 1928, the following coins were minted:
- 20 kopecks, made of silver, sample 500, weighing 3.4 grams, width 21.8 millimeters;
- 15 kopecks, minted from silver, sample 500, weighing 2.7 grams, 19.56 millimeters wide;
- 10 kopecks, made of silver, sample 500, weighing 1.8 grams, width 17.27 millimeters;
- 5 kopecks, imprinted from aluminum bronze, weighing 5.0 grams, 25 millimeters wide;
- 3 kopecks, minted from an aluminum-bronze alloy, weighing 3.0 grams, 22 millimeters wide;
- 2 kopecks, printed from aluminum bronze, weighing 2.0 grams, 18 millimeters wide;
- 1 kopek, made of aluminum-bronze alloy, weighing 1.0 grams, 15 millimeters wide;
- ½ kopecks, minted from copper, weighing 1.64 grams, 16 millimeters wide.
This year also minted coins in other countries:
- Switzerland, face value 5 francs, material - silver, rare;
- Austria, face value 2 shillings, material - silver, sample 640, issued to the 100th anniversary of the death of Franz Schubert;
- Australia, face value of 6 pence;
- Estonia, face value of 25 cents, rather rare coin;
- Poland, face value 5 zł, material - silver, rare coin;
- Great Britain, face value 6 pence, material - silver;
- Germany / Weimar Republic, denominations of 3 and 5 marks, material - silver, rare coins.