Very interesting short length of tarred rope recovered from the wreck of the Invincible, the first of seven Invincibles which was sunk in 1758. This piece came with a signed certificate of authenticity from the Invincible Conservation group. I would not have but the previous owner trimmed the COA to fit in the mount but it is done and it fits well so I will include the mount with the rope and certificate. Riker mount is about 21x16x5 cm. Neat item from a famous ship.