Thank you Peter for your swift and knowledgable reply - I have just found out that the tube was actually changed under warrantee about 5yrs ago (after deterioration of the picture) and the TV refurbished. I assume it would have been replaced with the same 50Hz model - any chance that it would have been up-graded? Sadly, my 'local' dealer is

I'm new to this forum and may become an owner of a Beovision Avant. The gentleman selling his system knows very little in the way of details about which model he has. Having researched the subject and questioned him, I'm fairly sure it is the Avant System 1 (number 8133) made in Denmark. The screen size (he measured it for me) is width 26"