What size and weight is it ?

Okay, this is a new attempt...it is much better....

The cymbal is 36 cm an has got a weight of 1280 grams. Here is a better photo of the stamp :

Well this is gonna have to be solved by drumaholic because if those are real deal Zildjian sigs inside. this is probably a teens or single digit clapper cymbal.

The sigs look real, the alloy looks old enough to me, but the moon is upsidedown in the star, I`ve never seen that stamp before.

I think that is what Drumaholic calls an Ersatz K. Search for threads with that content and read up. This is the first likely hit I found:

http://www.vintagedrumforum.com/showthread.php?t=12039&highlight=ersatz+k

Yours has a different die stamp but it does contain the classic pictorial elements of crescent moon and star and the word constantinople which are intended to evoke Turkey but are actually Italian made. There are lots of dies stamps used by the Italians. Most are illustrated in an image which Drumaholic calls the "rosetta stone". I searched for it but haven't found a copy of the image in a post here on VDF (yet). I'm travelling so I don't have full access to my own library which contains two copies, the original and the one Drumaholic most commonly posts which has some red circles around a few of the die stamps.

I noticed the moon was upsidedown but now I see that the two t`s in Constantinople on all the real deals are crossed with the same line. These one`s are not.

zenstat,

After reading that thread, I`m pretty convinced Italian stencil.

The went so far as to sign them similar. The upside down moon aint gonna be any Zildjian.

...OMG... a theme for really experts... did you take a look at the photos ogf the signatures,Zenstat? http://www.vintagedrumforum.com/showthread.php?t=48175

best regards from the northseacoast....

I don`t see it in this cymbal Peterson. Zildgian has two ups...L and d with a down J , none of that occurs in the closely resembling name on yours.

But the fact remains, Zildjian never put the moon upside down around the star.

Peterson, Drumaholic is Bill Hartwick, the man that invented and named the Zildjian time stamps. When you go to a site like Rob Scotts, you`ll see him use the name and year of stamps that Bill created. Zildjian did not create the names of the timline stamps.