6 canary yellow Eames DSS Stackers 1977 1978  

goodday. I have 6 of the above chairs. 3 are manufactured by Cincinnati Milicron, date stamped on base is 12 1 1976 on 1. These were purchased by a HM Plant Engineer in '76 -1977. He purchased these at the "employee store". The 3 from CM has holes drilled in them, supposing for outside storage so water would drain?? I the 2 from Summit Plastics in Kalamazoo. Stamps on these bases are from 1978. However, 1 of these 3 from SP has the raised HM logo and an S with a circle, AND a backwards capital B and a small capital A in the bottom right of the backwards B. These all are in good condition with the original inspector's tag: Brian Dawson Because we're not sure of the authenticity of these any "light" you can shed or can share would be most helpful.
Kind regards,
Gina Adair Schalk
Jan 5, 2013