Australian-Coins Forum

Australian Coins, Banknotes and Exonumia => Australian Errors and Varieties => Topic started by: Robster on July 22, 2014, 05:15:11 PM

Title: 1950 Penny, Cause and Effect.
Post by: Robster on July 22, 2014, 05:15:11 PM
Would the Die Crack on the left have caused the poor strike and lack of denticles on the right side of the coin.? (similar to Blakesley effect) Anyone have a similar coin.?

(http://i1343.photobucket.com/albums/o787/robster836/002_zps4f5f6820.jpg)
Title: RE: 1950 Penny, Cause and Effect.
Post by: nealeffendi on July 22, 2014, 05:39:19 PM
Is it a die crack or lamination flaw? I have never noticed any Blakesley like effect on either die crack or lamination flaw coins. Then again I can't say I've looked for it.
Title: RE: 1950 Penny, Cause and Effect.
Post by: Fordprefect on July 22, 2014, 05:58:10 PM
Quote from: 'Robster' pid='55189' dateline='1406015111'Would the Die Crack on the left have caused the poor strike and lack of denticles on the right side of the coin.? (similar to Blakesley effect) Anyone have a similar coin.?
Robster just about every '50 penny, Melb or Perth
are pretty much very ordinary in strike.
If you find a good one, especially Perth hang on to it.

Probably the coin you have imaged has had strike pressure
reduced to try and prolongue die life after the crack.
Title: RE: 1950 Penny, Cause and Effect.
Post by: JeffH on July 22, 2014, 06:00:46 PM
Looks more like a planchet lamination flaw than a die crack to my eye.
Anything noteworthy on the obverse?
Title: RE: 1950 Penny, Cause and Effect.
Post by: Robster on July 22, 2014, 06:40:12 PM
Thank you for your replies, indeed on closer inspection it certainly looks more like a faulty planchet. (delamination)! I will identify it as such.!!:ok:
Title: RE: 1950 Penny, Cause and Effect.
Post by: markn on July 22, 2014, 08:44:05 PM
Can we see the obverse?
Title: RE: 1950 Penny, Cause and Effect.
Post by: Robster on July 22, 2014, 11:39:51 PM
The obverse is quite well struck with no outstanding errors except for a flat area of denticles.! Will post a pic. tomorrow.!
Title: RE: 1950 Penny, Cause and Effect.
Post by: Robster on July 23, 2014, 08:23:06 AM
(http://i1343.photobucket.com/albums/o787/robster836/027_zps6c106b65.jpg)

The obverse shows a slight off-centre strike causing a doubling of the rim and the aforementioned weak denticles.
Title: RE: 1950 Penny, Cause and Effect.
Post by: Robster on July 23, 2014, 04:46:17 PM
This Melbourne minted coin would be the best struck I have, with the added bonus of a nicely doubled date.
(http://i1343.photobucket.com/albums/o787/robster836/028_zps9d79fc25.jpg)
(http://i1343.photobucket.com/albums/o787/robster836/032_zps208b31d1.jpg)
(http://i1343.photobucket.com/albums/o787/robster836/031_zpsd6b125b7.jpg)