Vintage Dress 1950’s/60’s/70’s era

I bought this from a vintage dealer 2 years ago to wear to a wedding. The seller was not able to precisely date the dress. I thought it a splurge but it is really exquisite, and yellow is my favourite colour! The beadwork alone is very admirable! I dry cleaned it after the wedding and am just now clearing my closet 2 years later! No tags present. Here are the measurements/features: Size: I am a solid size 8 and this fits me perfectly! The last picture is of me wearing the dress, I am a 34/36B bra. Length: 55 inches (shoulder to hem) P2P: 18.25 inches, lying flat Waist: 15 inches, lying flat Sleeves: sheer Lined: yes, fully Beadwork: all intact Hem: lace and sheer all intact Colour: pale yellow Closure: side zipper under left armpit Style: has an Edwardian feel/look to it. Probably a valuable dress and I haven’t finished researching a possible designer. Possible similar to Malcolm Starr!