Aluminium group- no patent stamp  

Hello there,

I have know about your forum for a long time. I am hoping members could help. I have owned a reclining aluminium group chair with the early mechanism upholstered in black vinyl with early antlers, for number of years now.

One thing I have noticed is that it does not have any stamp on the underside of the antlers, unlike others I have seen. I seem to recall that it had a Herman Miller sticker on it, although on inspecting it just now this does not seem to be there anymore. Perhaps t has fallen off in the interim the years.

Has anyone else ever seen this?

Thanks. I can post images if it would help

Noss