The short answer is that you cannot tell the difference, they are, for all intents and purposes, identical in appearance, and the dimensions and designs are the same.
Some say that the sterling silver Threepences have a more pronounced serif on the E's due to the density of the different metals. You will need a very good magnifying glass and a practiced eye to spot the differences.
If you really need to know, a reputable coin dealer may be able to assist.
Pictures of a specific coin are difficult to come by. Frequently you should be able to find one on eBay, but the picture is withdrawn after the coin is sold. The British 1920 Threepence changed from sterling silver to 50% silver during the course of 1920. There are no obviously apparent visual distinctions between the two types of coin. The 1920 Threepence is almost identical to the 1925 Threepence shown. See the link below.
Yes, England's currency is the British pound sterling.
sterling does not tarnish
No difference, they are both the same. A pound is just a shortened version of pound sterling.
nothing.
The same as it is now - the Pound Sterling.
sterling is always higher than dollar. What is the difference between sterling and pound?
AUDGBP is the term used for the comparison between the Australian dollar to the British Pound Sterling. Currently the Australian dollar stands at 0.61 British Pound Sterling.
They are all the same ... a Quid is a Pound is a Pound Sterling.
silver is usually stamped 925
Siam sterling was a style of jewelry made in Thailand in the mid-20th century and was briefly popular in the West. Sterling silver is a specific purity of 92.5% silver with 7.5% copper.
Oxidized silver is not necessarily sterling silver but sterling silver can be oxidized. Oxidation is a finish on silver, otherwise known as tarnish. Sterling silver can tarnish and silver plate can tarnish, too.