Pure silk beautiful 60's or 70's dress - removable collar

This dress is absolutely gorgeous. The quality of the silk is fabulous and it is in excellent condition for it's age. It has a removable collar that is attached with small pressure buttons. It makes for a completely different look. It would fit a modern US 8 to 10, or a European 38 or 40. Please ask all questions before buying. I can measure the dress if you are interested. Once I have taken the measurements, I will put them online. Thank you.