Here is the reply I got from an Ebay seller of many cymbals when I asked what "Hollow Logo" meant.........
"As we researched to identify these, we came across more than one reference that made mention of the characteristic of this logo. You would need to find some authority on Zildjian to learn what if anything a particular logo characteristic implies."
The question was spawned by the response I received from Drumaholic in this thread where I was asking about verification of some Zildjian A stamps on Ebay ....
( Drumaholic ) .... "Very few, and I mean only a very small handful, of those making claims of dates based on trademark characteristics on eBay has even the slightest idea of what they are talking about."
And, when I asked Drumaholic what source I could use to do my own research, the reply was....
( Drumaholic ) .... "Unfortunately there is currently no authoritative guide available for identifying and dating cymbal trademarks that can be used to further your research."
The previously mentioned Ebay seller's "Wiggle Room" / "non- response-type- response" to my Hollow Logo question lends much credence to Drumaholics statements in my book. There are many very wise veterans in this Forum which are always quick to share their knowledge with we less-seasoned members, and he is certainly one of those....
Thank-you so very much