The first 20 Escodo note from Portuguese East Timor (now East Timor) issued in 1967. On the front of the banknote is Don Alex, the national hero of East Timor, and on the back is the regional emblem of Portuguese East Timor. Issued by Banco Atlético de Portugal. Because East Timor was a Portuguese colony at that time, the currency unit was the same as the Portuguese currency, ESCUDOS (the Portuguese currency is called "Escudo", and the currency of Portuguese East Timor is called "Escodo", but the Chinese transliteration is different, but the Portuguese is the same of "ESCUDOS"). This is an old version of banknotes, which is no longer in circulation and has only collection value. It is currently worth about 35 yuan in the stamp and coin trading market.
The second one is a 20 Hong Kong dollar note issued by HSBC Hong Kong. The banknotes were issued from 1986 to 1990 (HSBC issued 20 Hong Kong dollar banknotes every year during these years. The pattern is the same, but the signature and date on the front of the banknote are different). On the front of the banknote is the "Lion and Horse Emblem", the regional emblem of British Hong Kong, and on the back is the HSBC Hong Kong Building. This is an old version of Hong Kong dollars, so it is more valuable for collection. The collection price is about 50-300 yuan (depending on the year of issuance, serial number and the condition of the banknotes).
The third one is the fourth set of RMB 1980 version 1 dime coupons. Needless to say more about this.
These are all genuine coins. It is very simple to identify the counterfeit: these banknotes are printed on special banknote paper, and they feel similar to RMB (the pattern is printed on an engraving plate, and it feels like Concave and convex feeling); In addition, the banknotes are embedded with anti-counterfeiting black lines, which are visible through light; and finally there is a watermark. Based on the above points, there is no doubt that your banknotes are genuine. Furthermore, these banknotes are all commercially available and are common types in banknote collections, while old coins are rare. If you have any questions, you can ask.