Queensland 2-P 1876 Blue

Just sorting out my album - not that these are worth anything

two 2p blue perf 12 with Q-crown watermark. They are the same print size but the perforation cut is different - one is about 25 mm high, the other is 22 mm. Any reason or history?, cheers

These look like line-perforated stamps. That is not always exact. Sometimes, it was done deliberately. Especially at the centre of sheets or panes.

so each line might be put in seperately instead of all at once?

That is what line perforation means. There can be more than one line of pins, but commonly, the sheet is perforated line by line and in two directions separately.

With comb perforation each line is perforated on three sides and the sheets moves only in one direction through the perforator. Several lines may be perforated at once.

Another explanation is that one or two sides were cut straight and someone added new perforations. That would reduce the size of the stamp.