Libertad tolerance on the sigma

[TommyTwoShots]

I have about 4 2013 libertads I bought from a seller on the groups on Facebook. Measurements are 40mm x 2.9-3mm and weights are all good.

They fall just to the right of the brackets on the sigma? Has anyone else seen this. I think they are real as it’s hard to get 1.03 Troy oz and accurate measurements but my sigma analysis is worrying me a bit.

[Relm]

Some types of analytical devices can become inaccurate over time but this doesnt seem to be as big a problem in metal analysers.  it seems liberads can vary slightly in composition. Can you test it against a coin you are confident about to set you mind at ease?  

https://buysigmametalytics.com/about

[TommyTwoShots]

20 minutes ago, Relm said:

Some types of analytical devices can become inaccurate over time but this doesnt seem to be as big a problem in metal analysers.  it seems liberads can vary slightly in composition. Can you test it against a coin you are confident about to set you mind at ease?  

https://buysigmametalytics.com/about

Thanks Relm, I have compared it with other 2013s and 2011s looks the same, ping is accurate but falls slightly outside the brackets.

[Relm]

Might need recalibrating then.  Did you get a calibration disc with the unit?

[TommyTwoShots]

9 hours ago, Relm said:

Might need recalibrating then.  Did you get a calibration disc with the unit?

It doesn’t come with recalibration equipment. I was just talking with a libertad dealer. Supposedly this is a common issue for libertads. Perhaps @motorbikez can help?