Bingo!
This was written under the forearm. Does this tell you anything?
What looks like "K", followed by 0.775. Then there is 18.6 stamped above 70 (presumably the hull length). Finally there is 16.5, written over 17.1.
Make any sense?
__________________
When the right to effective self-defence is denied, that right to self-defence which remains is essentially symbolic.
Freedom: Please enjoy responsibly.