New 2013 Panda Under Weight !!

P

Photonaware

Active Member
Just thought I would weigh a few new Pandas and was surprised to find after sampling 10 brand new coins that 50% were underweight.
My scales are precise.
Weighing new ASEs and new Britannias typically see up to 1.008 Toz
Some Pandas were about 1.002 Toz but half were below the magic number 1.000 Toz
If there is a tolerance on weight then the Chinese seem to prefer the lower margin rather than the upper.

731_panda.jpg


:(
 
Interesting, you say half were under 1 troy ounce? More investigation is needed, anyone with a sample of 2013s should get their scales out.
 
Just double check your scales. Get a guaranteed weight to calibrate. It doesn't matter what the others coins say, if it is out, it is out. To me your scales are out, as the others would not be so close to exact, so I would say your scales are weighing light.

I am certainly keen to hear further from others, not that I have any 2013. I do have a heap of 2012's though any one weighed one of these ?
 
Are you hitting the tare button between each weighing?

It's not impossible - after all, proof Krugerrands were recently found to have been adulterated with a lower than advertised gold content.
 
I would suggest trying what GP said, and possibly a more accurate set of scales.

The scales you have are likely only precise at its best to +/- 1%, since the graduation is 0.01. Possibly your manual will say something along the lines of "this scale is accurate within 1-2%".

Here's a list of things that can go wrong: Sources of error
http://en.wikipedia.org/wiki/Weighing_scale

E.g.
Error in mass of reference weight
Air gusts, even small ones, which push the scale up or down
Forces from electrostatic fields, for example, from feet shuffled on carpets on a dry day

The difference you're looking at is 0.4% (0.004) of an ounce of silver , around 1/10th of a gram (0.1244g). Gravity varies by over 0.5% over the surface of the earth.

I would consider 0.4% statistically insignificant, or within the range of error.
 
Maybe a couple of our resident dealers could weigh a few from their stock as a double check.
 
My scales are definitely good - just weighed a new batch of Maples, Eagles and Philharmonicas - all coming in over 1 Toz so the Pandas are definitely short of silver.
 
couldn't imagine anything from china being less than perfect (sarcasm icon)
 
Photonaware said:
My scales are definitely good - just weighed a new batch of Maples, Eagles and Philharmonicas - all coming in over 1 Toz so the Pandas are definitely short of silver.
Click to expand...
Just because the ASEs and Maples, ect. Weigh over an ounce doesn't mean your scales are accurate.

If an ASE is 1.05 toz and a panda is 1.01 toz and your scale is out 0.03 toz the the ASE will still be over at 1.02toz and the panda under at 0.98
 
As said previously: The scales you have are likely only precise at its best to +/- 1%, since the graduation is 0.01

Your scales accepted variance (+/- 1%) is more than 2x greater than the 0.4% difference detected.

Therefore the difference detected (0.4%) is statistically insignificant, and within the range of error.
 
yennus said:
As said previously: The scales you have are likely only precise at its best to +/- 1%, since the graduation is 0.01

Your scales accepted variance (+/- 1%) is more than 2x greater than the 0.4% difference detected.

Therefore the difference detected (0.4%) is statistically insignificant, and within the range of error.
Click to expand...

The precision is 0.01 grams so I accept 0.996 Toz would JUST be in the tolerance of 0.03% but there is also a 50% probability that my scales are reading high. Just wanted to share my experience having weighed lots of 1oz coins this Panda was the first to be read
below 1.000.
 
I just brought a few hundred from my local supplier I checked and weight it most of it weight around 30.89 to 30.99 gram . I have check my early purchase the weight is around 31.1 to 31.3 gram.
 
That's low - only 0.993oz. Sounds insignificant, but being "correct weight" should be sacrosanct for a legal tender bullion coin.

Would be good see proof of this thought on calibrated, accurate scales.
 
goldpelican said:
That's low - only 0.993oz. Sounds insignificant, but being "correct weight" should be sacrosanct for a legal tender bullion coin.

Would be good see proof of this thought on calibrated, accurate scales.
Click to expand...

Q.E.D.
 
Yikes. Funny I have tubes of all kinds, where all the coins are in capsules, and in tubes, and quite frankly the weight difference is quite noticeable!!
 
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