Another Eames Lounge to authenticate  

My late husband bought an Eames lounge and ottoman about ten years ago. I do not have any record of the purchase and I've always thought the pieces were reproductions. However, while researching another topic, I came across several postings describing how to tell an original Eames lounge from a look-alike. I now believe it is feasible that I have an authentic set -- or pieces of one perhaps. I would appreciate all input on the authenticity and any clues to the vintage. Here are the descriptive details and some photos to assist in the evaluation.
Chair has a 5-spoke black and silver metal base.
Ottoman has a 4-spoke black and silver metal base; does not swivel.
Chair feet are adjustable and have 'dome of silence' cushion glides.
Chair recline is not adjustable.
Chair and ottoman undersides have a Herman Miller paper label listing patent numbers filed between 1947 -1957 (per US Patent database).
There is no signature medallion.
There are no bolts through plywood shell.
The arm rest is curved, wrapped in upholstery and welted.
The arm rest is attached to the chair with 3 bolts. I read that most have 2, but one author stated 3 bolts were used in early models.
The cushions attach to the plywood shell with snaps and silver circular hooks. Several authors mentioned the circular hooks were used prior to the 1970's.
The number '146' is embossed on the interior face of each plywood shell.
The chair upper and lower back shells are connected by 2 metal braces.
The 2 back braces are attached to the shells at 3 points using black shock mounts. I cannot tell if the material is rubber or plastic.
The cushions have two buttons, fiber fill and black zippers.
The fiberboard cushion-backs each have a handwritten notation of the number '146' and abbreviations for the location of the cushion (LB, UB, CH, Otto) written with a yellow wax pencil.
The seat cushion and ottoman cushion are the same size.
The upper and lower back cushions are the same size.
Now for the Debbie Downer moment -- the cushions are upholstered in imitation leather; take a big breath, close your eyes and imagine 1960's tan naugahyde. Ug-ly.
Many thanks in advance,
RehabDiva