Mikimoto Cultured Pearl Necklace

This is a vintage Mikimoto cultured pearl necklace, presented in its original velvet-lined presentation box. The strand features approximately 75 to 85 graduated or uniformAkoya pearls, exhibiting a creamy white body color with subtle rose overtones and a high-luster finish. The pearls appear to be approximately 5-6mm in diameter. All pearls are individually hand-knotted on white silk thread for security and drape. A notable feature is the ornate silver-toned filigree safety clasp, which is decorated with a floral motif and a small seed pearl accent, a signature style for mid-20th-century Mikimoto pieces. The necklace is housed in a dark green velvet box with silk lidding interior marked 'MIKIMOTO CULTURED PEARLS'. The overall condition appears excellent with minimal signs of nacre wear or silk stretching. Based on the clasp design and packaging typography, this piece likely dates from the late 1950s to the 1970s. The craftsmanship is consistent with high-grade luxury jewelry standards associated with the Mikimoto brand.

I have virtually examined this vintage Mikimoto Akoya pearl necklace, which presents as a high-quality example of the brand's mid-century craftsmanship. The graduated strand exhibits the signature 'Hanadama-grade' characteristics often associated with Mikimoto, including a deep luster, creamy body color, and desirable rose overtones. The presence of the original silk-lined velvet box and the silver filigree 'M' charm or floral clasp signature adds significant value to collectors of branded luxury jewelry. Market demand for vintage Mikimoto remains consistently high, as the brand commands a premium over unbranded Akoya pearls due to its rigorous grading standards and historic reputation. Comparable sales for 5-6mm strands in excellent condition typically fall within the identified range. The value is bolstered by the excellent condition of the silk knotting and the preservation of the nacre, which shows no signs of 'peeling' or significant thinning. However, a definitive valuation is subject to physical inspection. Limitations of this virtual appraisal include the inability to verify the clasp's 'M' in shield hallmark or ensure the pearls are not lab-treated or high-quality imitations. To fully authenticate this piece, I recommend an in-person examination under 10x magnification to inspect the drill holes and nacre thickness, as well as a review of any original purchase receipts or certificates of authenticity. Scientific testing, such as X-ray radiography, would be the only way to definitively confirm the natural saltwater origin and culturing nucleus thickness.