Beautiful Chain Bib Necklace

Chain bib necklace. Not sure what the metal is, this necklace is not signed and I have polished with a dry cloth but could use cleaning. Normal wear for age. Please see note at the bottom of these comments. Please see pictures for more details. If you have any questions or would like more details, please do not hesitate to ask. All measurements are approximate. Non smoking home. We do have a dog. I will drop off for shipping next day, Monday through Saturday. If you purchase on Saturday or Sunday, I will ship on Monday (If the post office is closed for a holiday, I will ship the following day). I welcome all reasonable offers, I will either accept or I will respond back with my best offer. Thank you for looking! I am not an expert on jewelry and have done my best to give correct information. I purchased this as vintage, I do not know the exact date of the piece. I have only polished with soft cloth and I have made no repairs, or do I know if any repairs have been made before my purchase. Thank you!