Found this 10cm tall, 5cm by 3cm wide dark colbolt blue bottle in coastal clay bank, New Zealand.
Can't find any info on makers mark, it is a imprint rather than embossed, which looks either like a ship, a pot or a ufo inside an oval.
There is a seam which runs down both 3cm off center sides but not on the neck, lip or bottom.
A small mark, possibly molding mark, low down on one of the 5cm side and has a some air bubbles within glass.
Guessing it's either a citrate of magnesia bottle, but unsure due to small size, or a snuff bottle.
Any help would be appreciated especially with the makers mark, thank you.




