so as promised the result of some elbow grease... first a bored cat due to lack of attention...
(although the cat and the cane corso thought my fingers interesting: indeed they did smell like smoked beef when cleaning the animal fat of both blade and handle)
the only issue I met was at the top of the handle :
when cleaning it, a " V " or " M "- like pattern came forward. Just like on the blade. But whereas the blade has the " V " or " M "- like pattern only once at each side of the blade, here it is found circular all around.
I cleaned it as much as I could but refrained from going any further in order not to damage or erase this. Hope this all meets your approval or otherwise please advise what I should have done or not, thnx a lot , merci , grazie mille !