If you hover over the abbreviation PLZ that is shown in the blue rectangle at the individual coin page, you will see "Third złoty (1949-1994) (Poland)". But the information that 100 Groszy = 1 Złoty is missing and I strongly suggest it to make easily available. With this particular example it is not that hard, but if you want to know that in the Kingdom of Lombardy-Venetia in 1815-1862 when the Scudo was used the units were 100 Centesimi = 1 Lira • 6 Lire = 1 Scudo • 40 Lire = 1 Sovrano, it is really difficult to find this information quickly.
Ah I hadn't actually noticed that - I'd seen the full reference title when you hover over it, but hadn't paid enough attention to the monetary unit underline.
Re having the information about sub-units, there are plenty of examples where units have changed over time but with the same or similar names - UK coinage changing over to decimal for instance.
Status geändert zu Akzeptiert(Xavier, 30 Jan. 2019, 22:03)
Status geändert zu umgesetzt(Xavier, 1 Okt. 2019, 22:05)