Does anyone have any clue why the stated age of this bottle is 16 y.o. while the distillation took place in 1999 and bottling in 2018 ? Normally it should be 18 or 19 y.o. 

Tried it end of September. One of the best whiskies I had for some time. No matter if it is 16 or 18 y.o. it is superb and doesn't make you regret the money spent on it. I am not a big fun of HP but this one definitely made me want to try more Orkney IB

Nose:
Delicate notes of smoke, creamy, honey-like sweetness with salt - fresh sea spray in flowering heather, with excellently integrated alcohol. Dry pine forest with ripe pineapple on top.

Taste:
Creamy with significant amounts of smoke, at the same time beautiful sweetness of ripe lemons with freshly cut vanilla pod

finish:
Smoke and fruit aroma are transformed seamlessly into distinct spiciness with some resinous, ginger-like sharpness

Conclusion:
This is a full legal HP with everything that belongs to it! Removes the 18 year old OA completely, not only because of the alcohol strength (which is almost terribly well integrated, so that there is no desire for water), but simply because of the intense aromas, which is probably due to a very good barrel selection and prudent maturation have come about.

Green Welly Stop writes: „A Mis-print on the label, this is an 18 year old whisky.“ (https://www.thegreenwellystop.co.uk/orkney-1999-berrys-cask-28.html#additional)