When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Up for sale is a rare, vintage U.S.A. Standard Deep-Frame Wet Washing Sieve manufactured by the renowned Humboldt Mfg. Co.. Featuring a heavy-duty, extra-deep brass frame, this specialized laboratory instrument is engineered for washing away or separating ultra-fine particles without sample loss.
The data plate is fully intact, readable, and includes all original manufacturer specifications.Technical Specifications• Manufacturer: Humboldt Mfg. Co. (Chicago, ILL. 60656 U.S.A.)
• Sieve Number: No. 325
• Aperture / Opening Size: 0.045 mm / 0.0017 Inches
• Frame Style: Extended Deep Frame (Wet Wash Series)
• Frame Material: Brass
• Standard Compliance: A.S.T.M. E-11 / A.A.S.H.O. M-92
• Diameter: Standard 8 inchesCondition• Pre-owned / Vintage Condition.
• The deep brass frame features a beautiful, authentic aged patina with minor cosmetic surface wear, scuffs, and oxidation typical of laboratory or industrial testing use.
• The ultra-fine No. 325 mesh screen is intact with no major tears or punctures (please review photos carefully to inspect the mesh uniformity).
• Fully functional for grading fine aggregates/soils, or an exceptional, standout display piece for scientific, industrial, or steampunk aesthetics.Shipping & Handling• Securely packed in an oversized box to fully protect the deep frame and delicate mesh during transit.
• Shipped via USPS Ground Advantage / Priority Mail (or your preferred carrier).
• Ships within 1–2 business days after cleared payment.
