Hi! They sent me this image, but I don't know what it is exactly... the stabilizing fins look like pneumatic mortars, but I have no idea... it looks like some kind of stabilizer for some aquatic instrument, but like I said, I have no idea... the two holes you see are not through holes.
![DSCN0984[1].JPG DSCN0984[1].JPG](https://www.bocn.co.uk/data/attachments/179/179054-d34e6c76e71be558b58d2ce21c60772d.jpg)















