Watch/Grinder through airport

Hi, recently I bought one of this kind of type watch/grinder from ebay,not one of these, but this kind of type:
http://www.everyonedoesit.com/online_headshop/weed-star-mens-grinder-watch.cfm
http://geekologie.com/2013/05/hidden-watch-weed-grindersstorage-contai.php

I have planned my vacation for a week back to my country, because currently I am working in Norway (don't plan to be there more than 2 years anyway).
So, I wanted to ask you, would I get any suspision or check if I will carry it on my hand through all airport? Of course, I could put it in checked luggage,
but logicly thinking, It shouldn't catch any eyes on it. The watch hasn't been used, but I have a little fear of taking it with me. I don't want to mail it,
just because I don't want my family to know. I'm not gonna take it back to Norway, so basicly it's one way ticket for it.

Thank you for your answers

please tell me you didn't pay $55 for that thing..

imvho, i'd not even risk it, it's only a grinder, and not like you can't smoke weed without a grinder.. just seems kind of silly to m to risk getting busted over something you don't even need to begin with..
i know you said you don't want to mail it, but that's exactly what i'd do.. you said you don't want your family to know, i guess that you smoke, but a., does your family open your mail, i sure hope not, and b., even if they did open it, all they'd see is a watch and would really have no idea what it was imo..
my $.02

Yo ! ...but it tell the time ..?

http://www.startrad.com/images/Grinder/Watch Grinder Blue.jpg
Exactly the same, YES it can tell time
EDIT:

please tell me you didn't pay $55 for that thing..

Click to expand...

Nope, pay'd about 23~ dollars + shipping so about 30 dollars

Don't risk it over a grinder dude. There not a necessity, you can smoke without it. Not worth the risk.

No THC residue, no problem? Only thing is TSA might say "WTF is this" on the xray? Be ready for the anal cavity search. Lol