The embassy tenor may be a Buescher stencil. I came across one a couple of weeks ago and Googled for more info. Below is a post from SoTW. But as already stated - wait for Pete and Kev - they are the experts. All info I have included I have found via Googling!
Thanks for asking your question on AllExperts. I don't have any pictures to go on, but it's most certainly a stenciled saxophone. A stenciled saxophone was made by a major manufacturer but they would have engraved a different name on it. Companies, music stores, schools and other businesses would order a number of saxophones from a major saxophone maker and have their name put on instead of the company that made them. A major manufacturer could also create separate brand names to compete in certain markets or may have purchased a smaller company and kept the name. Whatever the reason, for the most part these stencil horns were built with many of the features and quality of their parent company. The major saxophone companies that made stencils were Conn, Buescher, Martin, and Selmer. Some of these companies were purchased in time and became stencils themselves. After doing a bit of research, I discovered more information about Embassy. They were made by at least three different companies. There was an alto was made by Couesnon in France and it's a professional grade saxophone. I've also seen an alto made by Pierret that seemed to be an intermediate or student horn. Another person meantioned that he felt his embassy tenor was made by Buescher. The 'Embassy' and 'Acadamy' names were used by Besson and Boosey & Hawkes for certain markets in the 1960's. Does it say "Made In France" or anything else on it? There are many ways to tell if a saxophone was produced by a certain company. Look at the tone hole construction, G# key cluster design, key guard design, Bell to bridge brace, neck, key layout, Bottom of the bow guard, octave mechanism type, engraving, and serial number markings. The serial numbers of the stencils did not follow the parent company's serial numbers, so it is hard to tell the year it was made but you can usually tell the decade, 20's, 30's, 40's, 50's, or 60's. The Embassy is not on the stencil sax list, but if we see photos... we might be able to do some detective work. It could be made by Buescher or Boosey and Hawkes, but we'll never know. More research is still needed. Anyway you look at it, you have a historic saxophone. Get it fixed up but don't refinish the body, leave it as it is. When someone re-lacquers a saxophone, the value is reduced. If it is a silver plate finish, you can use a gentle silver polish. If it's gold plated sax, leave the finish alone. It's worth what some one would pay for it. It could be worth $150 to $650 depending on the condition and part of the country. If it plays great, please don't worry about how much other people think it's worth. Their opinion doesn't matter. If you love it, and play the heck out of it, that's all that matters. Have fun!!
Good Luck!
TSgt Grant Koeller
USAF Bands