Registration

These registration postmarks are relatively common in the 1940s and 1950s issues. They are often found on the high value stamps and as such probably indicate some fiscal use of this cancellation.

An unfortunate forged registration postmark on a relatively uncommon stamp. A well known  NB dealer told me the ink just does not feel right and he is absolutely correct.

Arrival postmarks

Clear arrival postmark for London.

2c green with a " Micky Mouse" type mark with the letter R on top, some sort of return letter mark perhaps. I assume it is of UK origin but I could be wrong. It is not like any postage or fiscal marking for NB that I know of.
Update It looks like part of a "registered London E O" cachet that I have seen on an Oswald Marsh envelope.

Probably not of UK origin but still very interesting to look at.

Update It is a "Killer" oval duplex cancellation from USA with the example on cover as shown below. It cost me a fiver and I wonder how much a good cover like this would sell for if it were NB.

A very nice clear arrival cancellation for Brisbane, Queensland, Australia.

Wavy line killer cancellation likely to be of GB origin but a smaller version was also used in the Straits Settlements.