MALAYSIA $1.00 COPPER-ZINC-TIN BLANK (1989-1996)
Copper-Zinc-Tin Blank Of Malaysia Bunga Raya Series Dollar Coin (1989 - 1996).
The second series of Malaysia sen coins (The Bunga Raya Series) entered circulation in late-1989, sporting completely redesigned observes and reverses, but predominantly retaining the design of edges, diameters and composition of the first series' (The Parliament House Series) coins.
Changes include the depiction of items of Malay culture on the obverse, and the inclusion of a Hibiscus rosa-sinensis (Malay: Bunga Raya), the national flower of Malaysia, on the upper half of the reverse. The second series was designed by Low Yee Kheng.
In addition to changes on its observe and reverse, the size of the 1989-1996 1 ringgit coin an exception.1 ringgit coin was also reduced from a diameter of 33 mm to 24 mm, and was minted from an alloy of copper, zinc and tin, as opposed to the first series' cupronickel. The $ symbol was brought over to the new coin, but was dropped in favour of "RINGGIT" for coins minted from 1993 onwards.
On 7 December 2005, the 1 ringgit coin was demonetised and withdrawn from circulation. This was partly due to problems with standardisation (two different versions of the second series coin were minted) and forgery.
How blanks are made ?
Coin blanks used for striking coins can be purchased from coin blank suppliers, or be produced by the mint itself. In making such blanks, bars are first scrubbed to provide a consistent surface, free from impurities or imperfections which not only produce defective coins, but also reduce the life span of the dies.The bars are later annealed and rolled to become strips of metal having the exact thickness specified of each denomination of coin.
Blanks and planchets represent the same product at different stages of production: the unstruck, circular pieces of metal that become coins when struck between the dies. Blanks are unfinished planchets that haven't been through all of the processing steps necessary before they can be struck into coins. Once a blank has been through all of the processing steps, it becomes a planchet and is ready to be struck.
In addition to changes on its observe and reverse, the size of the 1989-1996 1 ringgit coin an exception.1 ringgit coin was also reduced from a diameter of 33 mm to 24 mm, and was minted from an alloy of copper, zinc and tin, as opposed to the first series' cupronickel. The $ symbol was brought over to the new coin, but was dropped in favour of "RINGGIT" for coins minted from 1993 onwards.
On 7 December 2005, the 1 ringgit coin was demonetised and withdrawn from circulation. This was partly due to problems with standardisation (two different versions of the second series coin were minted) and forgery.
How blanks are made ?
.JPG)
0 comments:
Post a Comment