So I was inspecting my old Krugerrand which I bought at a coin shop 12 years ago (coin is from the 70s) but never really tested. Calipers measured ok, sigma analytics testing was within the brackets, and then came the scale test. It is just slightly overweight at 34 grams vs. 33.93 which it should be on paper, or 1.093 Troy Ounces instead of 1.09 which should be it's actual weight. Are these coins known to run slightly overweight? I know it's not the scale ...just calibrated it recently and it's 100% spot on consistently with 50 gram weight, 100 gram weight, and 500 gram weight. Any thoughts?
Uncirculated? 0.007 could be dust bunnies. 3 decimal point scale? 0.000? Weight it along with the 5 gram calibration weight.
Yeah, never really thought to use my 5 gram weight. Maybe that's it? I'll have to remember now where the hell I put it because I know I bought one of those too a while back and never really bothered to use it for my calibration. Still, I do think regardless that it is a valid question. Does it have to always be exactly 39.93 grams or do they have a slight variance with 39.93 being the minimum accepted weight? Just curious regardless.
Got an interesting reply in another forum from someone who also owns old Krugerrands 45+ years old. Apparently his are also just slightly heavy. Maybe that was a 1970s thing.
I have 15 Krugerrands currently, as I collect the dates and the bullion is just a bonus...LOL, weights are pretty consistent on my end, but what I find very intriguing when it comes to Krugers, populations are in the millions 74-84, huge drop off 85 -06 some years as low as 42,334 (1991) my middle sons ( Brandens Birthdate) in 2000, only 6,657 were produced, 2007 - 2013 in the hundred thousands again they stopped keeping records in 2014, so your really on your own when it comes to finding out whats out there, you have to remember this is a world wide coin and very popular, so if your collecting key dates patience is required...LOL
Normally in any process there is a distribution of measurable values. For something like bullion, underweight is unacceptable. You can either 100% inspect, make them overweight so the distribution excludes underweight items, or a combination of the two. That's why your 2-liter soda bottle no longer comes with a large visible gap - they got sued because SOME were underweight. Cheaper to over-fill...
What kind of scale is it? I'm pretty sure none of my scales would be accurate to within 0.01% of their capacity across their full range...
