CANADIAN ERROR COINS - TWO DOLLAR STRIKE VARIETIES
Two Dollar Striking Varieties
Types that occur due to variations (errors) that occur during the Strike of the coin .
This Misalign Core Strike is the result of the core sliding partially above or below the ring prior to striking. Rings are first fed into the rotating sprocket type feeders. As the ring rotates towards the dies, the core is added two stops prior to striking.
Note on the images to the left that the core on the reverse appears elliptical, while on the obverse it appears stretched and oblong. In this case the core slid partially below the ring prior to striking.
In Canada the "Head" side of the coin is the called the obverse, and it is always the bottom die on modern coinage. The face of all dies used in Canadian Mints are slightly convex. This helps to force the metal during strike to spread out and fill all incused design elements easier than a "flat die". The mint uses this standard process also as the key to making the inner core flow into (lock with) the outer ring. In the case of the Two dollar coin, the core is actually "hit" first forcing the harder metal to flow in the path of least resistance, into the center of the ring.
The most desirable are those showing a see through crescent shaped gap around the core.
A close examination of a major Misalign Core strike reveals that the inner
hole on the ring is upset prior to striking. Upsetting the edge of a blank is a
routine practice done primarily to preserve die life. It reduces the amount of
metal the dies must move to create rims. Also from the Misaligned core shown
below it is quite clear that the core is also upset. The upset appears to be a
different type than normally used and may be important to the locking mechanism
created during the strike. *Estimated value
-$100.00 -Those that have a "see thru" opening.*
"Broken" Two dollar coins that have surfaced are generally coins broken intentionally. I have examined a few that were clearly the result of Misaligned cores. If the core is not properly seated in the ring prior to striking, the locking mechanism is not achieved. If you have a chance to view a Misaligned core strike you will notice that on one side the core appears smaller and egg shaped while the side the core will appear stretched or even oblong. The metal of the misaligned core was allowed to flow over (or under) the ring producing a different type of strike than was intended.
|These images to the left show quite clearly that Misaligned core strikes are prone to fall apart. To create the locking mechanism, it requires the core to be properly seated in the ring during striking to produce the interlocking of the two pieces. The Core is made of Aluminum Bronze. *Estimated value -$35.00*|
The Aluminum Bronze core is harder than its nickel counterpart -the ring. During the strike the core cuts into the ring as the nickel ring's metal is displaced easier, and it flows over the core producing the interlock as shown.
The term Off centre is often applied to these strikes, I find this confusing sometimes when I see advertisements for Off centre Two dollar coins, and for the time being prefer Misaligned Core. Many true Off Centre Two dollar coins have appeared and all agree it is a different animal.
Here is a very nice misaligned core that is
the result of a striking error.
This coin was struck with the core misaligned to the hole of the ring. On this example the core was so far over that it extended outside of the collar and forced the collar down during the strike.
The rim of this coin exhibits a very nice Partial Collar!
*Estimated value -$350.00*
A nice "Indent by Coin" on a Two dollar coin has surfaced. This one is a real beauty as it was caused by a flipped over coin! Generally in Canada these strikes occur with incused obverse design on the regular reverse, this one shows incused reverse across 60% of the coins reverse. These are called "Partial Brockages" by some and this one would be further noted as "By a flipped over coin". *Estimated value -$150.00*
A most spectacular occurrence.
This coin shows the result of 2 cores being involved with the strike.
The extra core in this case, fell out after the strike.
Image tells it all.
*Estimated value -$350.00*
At a (9/97) coin show I had the chance to examine a nice Struck thru Grease Two dollar coin. This one covered about 25% of the area on the reverse. The coin was found by a collector who did not want to sell, but was looking for information. He had found the coin in circulation. *Estimated value -$25.00*
Here is a nice example of a weak strike.
The core and ring have very poorly "merged", due to the lack of force during the strike.
*Estimated value -$150.00*
The image above is a side view of the coin on the right. It clearly shows a very nice "Partial Tilted Collar Strike."
The Numbers 6 and 12 correspond to the clock positions of the coin.
A very nice type on a Bi-metallic coin.
It appears this Two Dollar coin received a small Partial Brockage by a planchet in the area indicated by the arrow and the #1.
It was then struck a second time, way off centre with a unifaced reverse, as indicated by the arrow and #2.
When it was struck the second time it left a small Partial Brockage on the coin that was in the collar.
A very interesting item that may provide insight into Die orientation in the press and in what direction the planchet is fed.
Prior to 1996, evidence based on observed error coins, has always indicated that planchets are fed from the 12:00 o'clock position of the Die, and are ejected traveling in the direction of 6:00 o'clock.
This coin, along
with certain tool damage types, indicate it appears that
planchets now come in at 9:00 o'clock and exit at 3:00 o'clock.
It may be that this coin holds clues to solve current and future riddles.
Please send any information regarding Two Dollar Error coins to Patrick
Canadian Error Coins | Main Directory
Page created by: muckwa
Changes last made on: 02/19/04