You do not give a country or description of the coin.
All Florins will have a date on them somewhere. It may be in Roman numerals on 19th century British Florins.
Alternatively, any coin with a "genuine" minting flaw would have some value, above the usual, as a collectible coin.
Genuinely flawed coins are not necessarily known about or documented until somebody turns up with one, since they are an "accident" of the minting process, and have escaped detection during quality control at the mint therefore, a valuation cannot be anticipated.
A reputable coin dealer should be able to identify and confirm the coin as genuine and make a valuation.
The first British Florin was introduced in 1849.
The last British Florin was minted in 1970.
There was no 1861 British Florin (Two Shillings) minted.
The last New Zealand Florin was minted in 1965.
The last British general circulation Florin was minted in 1967.
Such a coin does not exist. The first British Florin was introduced into circulation in 1849.
The last British Florin minted for general circulation was minted in 1967.
Austria ceased issuing Florin coins in 1867.
This will depend on its date, condition, and whether it was ever circulated. A coin dealer will be able to show you the value in a book.
Such a coin does not exist. The Florin (Two Shillings) was first minted for general circulation in 1849.
Of the countries issuing a Florin (Two Shilling) coin, only Australia ever issued a commemorative Florin, but there were no commemorative Florins issued in 1936.
The first British Florin was issued in 1849, so it is unlikely that there would be a Half Florin coin minted any earlier. There was never a British coin called a Half Florin. If one existed, a Half Florin would be One Shilling.