Modified coins have no collector value.
The ring may have some value.
Thrupenny bit ! A small silver coin issued for hundreds of years until 1945. The silver Threepence was gradually replaced by a brass coin with 12 sides and issued from 1937 to 1967. The Threepence had a value of 3 Pence. The equivalent of 1.25 Pence in today's money. Depending on the type of Threepence, its condition and date of issue it could be worth anything from a few pence to several hundred Pounds. Most commonly though they are plentiful and not worth much at all. Under £1.
The 12 sided British Threepence issued from 1937 to 1967 inclusive was made from a nickel-brass alloy. The small silver British Threepence issued from 1920 to 1945 inclusive were made from an alloy of 50% silver, nickel and copper. Although the silver coins were circulated in Britain, they were intended for use in several of the British Colonies.
There were no $1 silver certificates with series 1937 for the year.
There were no $1 silver certificates with series 1937 for the year.
Retail price is $3.25 in G-4 and bullion value is $3.15
An Australian 1927 sterling silver Threepence (George V), uncirculated and in absolute mint condition could fetch up to $400 AUD. If it has been circulated but still in good condition, it might fetch anything from $2.50 to $80 AUD. There were 6.720 million minted. An Australian 1927 sterling silver Threepence (George V)(Proof), uncirculated and in absolute mint condition could fetch up to $35,000 AUD. A reputable coin dealer will be able to give a more accurate valuation.
The small 50% silver Threepences (16mm) were still being minted for the Colonies from 1942 to 1945 inclusive. The changeover to the 12 sided nickel-brass Threepence (21mm) commenced gradually from 1937.
The dodecagonal (12 sided) British brass Threepence was first issued in 1937. The Edward VIII coins dated 1937 were never released into circulation and were melted down. Some coins given to vending machine manufacturers for testing purposes, were never returned. The official first release of the brass Threepence was in 1937 with George VI.
A 1937 quarter will have George Washington's portrait on it. You must have a half dollar instead. A circulated 1937 half is worth about $2.88 as silver bullion today (spot silver is $9 / troy ounce). Numismatic value runs from $3 to $5 in Good condition and from $6 to $10 in Very Fine condition, depending on the mint mark.
A 1937 Mercury dime is common, average value is $3.00-$6.00 depending on the condition of the coin.
Please check your coin. Edward VI died in 1553. There were no British 1937 Edward VIII coins issued with his name or likeness on them.
The U.S. did not mint any silver dollars for circulation after 1935. Please check the coin's date and denomination, then post a new question that includes its mint mark (if any) and condition.