Partime, Love your oddities. Indulge me posting the following image(perfed 2.5mm short on width) on your 'oddities thread'...found in box of 600+ NSW 2d Blues. At the very least, a full vertical row similar was made/issued.
Rod222...exactly, BUT it's genuine(imo).. 'possibly set wrong' at the start of perfing after cleaning/maintenance etc. Must be a column, at least, out in collectors stash. I only soaked it off envelope corner last week when searching for private perfins for another Thread.