The actual pin numbers on the plug are not consistent across all plugs
Lawley (a patent agent), we do not know which company actually made the glass itself
A long running and highly successful series from Lucky Strike played on the slimming power of tobacco - suggesting that if you didn't smoke, you would eat sweets instead and become obese instead of, in this case
21 at least brings tobacco into line with alcohol and cannabis, but there is no similar precedent for raising the age to (say) 25, and if the argument that its acceptable to smoke at 21 but not at 20 seems arbitrary, it seems even more so when the ages concerned are 26 and 25
Long-term exposure increases the risk of chronic respiratory and cardiovascular disease and death, impacts on birth weight, and can permanently affect the lung development of children Environment NSW page 22