The type of coin that is round with a square hole in the center is known as a "holey" coin, commonly seen in various cultures, particularly in East Asia. One of the most notable examples is the Chinese cash coin, which typically features a square hole to facilitate stringing many coins together for easier transport and storage. This design has historical significance and reflects ancient practices related to currency.
It wasn't done at the mint. Someone may have drilled a hole to hang the coin on a lanyard, to use it as a washer, or even because they had too much time on their hands. Unfortunately the hole destroys any collector's value the coin may have had.
Coins with a hole in the center and the letters "R" and "F" are commonly associated with the Japanese 5-yen coin. This coin features a hole and has the characters "R" and "F" as part of its design, representing the Japanese script. Additionally, some other coins, such as certain Chinese coins, may also have holes and similar markings, but the 5-yen coin is the most recognized example.
You are asking about a 10 Bani coin from Romania (KM#32). The coin is made of Copper-Nickel, weighs 4.00 grams and measures 22mm in diameter with a hole approximately 5mm in diameter in the center. The obverse (front) has a crown above the center hole and a banner, with "ROMANIA" on it, below the hole. The reverse (back) has "10 BANI" above the center hole and "1906" below it, with a florette on eithe side of the date. 24,180,000 were produced at the Brussels, Belgium mint in 1906, and another 17,000,000 at the Hamburg, Germany mint (signified by a "J" mintmark on the coin) in that same year. According to the Standard Catalog of World Coins, an example is worth about US$0.50 in Fine condition, about US$1.50 in Very Fine condition, about US$8.00 (US$9.00 for the "J" mintmark) in Extremely Fine condition, and about US$30.00 (US$32.00 for the "J" mintmark) in Uncirculated condition.
18mm It was decided in a meeting by someone putting a coin from the Netherlands on the table and said that size would do.
Belgium Not an arch but capital A letter for Albert I monogram Same design for 5 or 10 or 25 Centimes coin On reverse is a plant stalk on left and denomination on right. Issued generally 1910 to 1932 (varies for each denomination/type). Also, though a Belgium coin, each has two language types - with French or Dutch lettering. Either reads BELGIQUE or BELGIË on front.
One cent (Canadian or US since the exchange rates are so similar). 1975 is a common date and only worth a penny regardless of the shape it is in. The hole was created after the coin left the mint and so the coin is damaged and worthless to a collector.
One well-known coin with a hole in the middle is the Chinese "cash" coin, traditionally made of bronze or brass. These coins typically feature a square hole at the center, which allowed them to be strung together on a cord for easy transport. The design symbolizes good fortune and prosperity. Similar coins can also be found in other cultures, such as the Japanese "mon" coins.
There have been several European coins with holes in them in the 20th century. Spain had a hole in their 5-peseta coin from 1990 through 2002, when they switched to the euro. France, Denmark, Belgium, Greece, Norway, Hungary, Finland, Romania, Poland, and Yugoslavia all issued coins with holes in them since 1900.
No it's the hole that kills collectible value. If the coin is silver it has scrap value
It gets bigger
The hole was used to tie a string in order to recover the coin once the coin was used in a vending machine .