As Nick says, Avons must be the best there is, despite their age..mine are over 20 years old, weigh up to 40 lb amd are accurate as they come when zeroed.. I have a large piece of "pig" iron that weighs 6-1/2 lbs, I took the iron to the local post office and asked them to weigh it on there parcel scales, which they did, I then wrote on the iron its weight.. I did the same thing with a larger piece, so now I can check the scales at two seperate weights any time I like, the Avons are always bang on after being zeroed, with a damp weigh sling hanging off the scale hook, or not
I also have some digitals, but they are a pain as they divide each pound up into 100 parts , instead of into pounds and ounces, they are accurate enough when tested on the above weights, but it is a pain having to convert however many hundredths of a pound they record into true pounds and ounces weight. I have drawn up a conversion table, but its still a pain.
David.