Thank you gentlemen for your thoughts.
I completely agree with you on the points that you have made. What you are saying is what has made Zen so appealing in my opinion.
However it seems to me that you are referring to a Zen attitude that you have as opposed to a Zen quality that an object possesses. The way I understand it, your Zen thoughts are being "stimulated" by an object which indicates that the Zen quality is in you. Put another way, how we see something does not necessarily mean that something is, and it does not necessarily give something a Zen quality. If I have the right attitude I could say that this computer is Zen, but that does not necessarily make it so.
I wise man once told me, to understand Kaneie, Nobuie, Yamakichibei and all the great people in the tosogu world, you need to have an understanding of Zen. This lead me to discover this book which I feel explains very well what makes something Zen (if words are able to define it) .
http://www.amazon.co.uk/Zen-Culture-Tho ... 0394410726
Also, below is a good essay which some of you might find interesting:
http://www.friesian.com/divebomb.htm
Finally, to me this tsuba has Zen quality. I chose it as an example because the design is not abstract and is clearly of a tea whisk used in tea ceremony, just as the lovely menuki are of blossoms and a branch.
The suggestivness, the roughness, the detail and the seemingly rustic look to me epitomizes which we sense as Zen quality. I can't find the colour version, but I think this black and white will do.