That's actually an interesting question to me (remembering I'm a statistician and scientist and what interests me doesn't always interest others). Some of the info you have stated would still stand independent of the stamp. For example:

[INDENT]18" diameter

1500g weight (more or less)

1 3/16" tall stamp

[/INDENT]

This one:

[INDENT]sounds really good[/INDENT]

isn't measured on a scale which anybody can agree on. :D

When presented with partial information about a cymbal (particularly in the age of the internet with "remote buying") stamp eras are believed to either:

[INDENT]indicate enough of the sonic properties to help fill in the picture

[/INDENT]

or

[INDENT]indicate more about what the expected price range should be (eg: Trans stamps go for more than 1970s cymbals other things being equal)

[/INDENT]

Weight is similarly a proxy for how a cymbal might sound. For example I would think differently about your cymbal if you said it was 1200g vs 1500g vs 1800g. But "exact" weight isn't such a big deal to me. So I'm not concerned if the "exact" weight is 1500g or 1450g or 1550g. By 1650g I'm thinking there is a difference. This is entirely my mind at work until I hear a sound file. A decent sound file trumps beliefs about sonic properties from weight.

The weight is a factor in predicting price (along with the stamp era). Thin is in (another way of saying: thinner A Zildjian cymbals tend to have a higher expected price other things being equal).

You'll have to check with Mark (Boslover) about why he insists on a picture, but I suspect he doesn't know you therefore doesn't trust you to be able to pick the era of a stamp properly. Whereas I know you read my detailed post on this which has since been erased by the database fallback. ;)

I did take the precaution of backing it up and it will come back online at my own web site pretty soon. I'm still working on a few editorial improvements.