Posted 01/30/2008 3:00 pm
Your terminology is non-standard, farnbycoins.
Your first example is not an off centre strike. The planchet has been struck in the centre but the obverse die is slightly off-centre. It is reasonably common, particularly on $1 and $2 coins, and very common in some years (e.g. BOTH dies on the 2004 MOR dollar and the obverse die on the 2000 $1/10c mule). The only predecimal example of this that I know of is the 1946 Perth shilling, which has a huge obverse die offset. It is extremely rare and I have only heard of two examples.
The second example you show appears to be a partial collar. The planchet is not fully engaged by the collar so that you get a partial impression of the milling with the metal squeezing out in the region where there is no milling. The collar is often tilted on decimal coins but not always.
Other examples are ramstrike (where the planchet is off-centre but is forced into the collar resulting in milling appearing across one face of the coin) and broadstrike where the collar is not engaged at all.
Your first example is not an off centre strike. The planchet has been struck in the centre but the obverse die is slightly off-centre. It is reasonably common, particularly on $1 and $2 coins, and very common in some years (e.g. BOTH dies on the 2004 MOR dollar and the obverse die on the 2000 $1/10c mule). The only predecimal example of this that I know of is the 1946 Perth shilling, which has a huge obverse die offset. It is extremely rare and I have only heard of two examples.
The second example you show appears to be a partial collar. The planchet is not fully engaged by the collar so that you get a partial impression of the milling with the metal squeezing out in the region where there is no milling. The collar is often tilted on decimal coins but not always.
Other examples are ramstrike (where the planchet is off-centre but is forced into the collar resulting in milling appearing across one face of the coin) and broadstrike where the collar is not engaged at all.
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