Seven Seas Maori Playing Cards

I recently obtained this unusual pack of playing cards with court cards depicting Maori people with decorative clothing and traditional tattoos on the faces. The cards are printed in black and red, and interestingly the court cards are simulating the English pattern in the way the courts are facing and where the objects are placed. The reverse has a Maori design in blue.
After doing some research it looks like the cards were printed by the United Empire Box Company (UEB) who operated in New Zealand from the mid 1960's until 1989. The ace of spades is the same one they used often together with black and red English pattern court cards. The suit signs and index type are also the same as used by UEB.

I have not been able to find any references for this deck of cards, so it was possibly especially designed and printed for the Seven Seas company which is an International Shipping company with offices in Auckland, New Zealand, although I cannot find a match for the logo on the box.
The pack consists of 52 cards plus 1 fierce looking Maori joker and 2 blank cards in a slightly unusual flip top box. I estimate it to have been made in the late 1970's or early 1980's.
If a reader has any more information about these cards I would love to hear about it.

Below: the front and side of the box.

All cards shown are from the collection of Paul Symons ©