Producer				Refined At				Code				Brand Marks
	ASARCO Incorporated				Amarillo, Texas				ASAT				ASARCO SILVER - AMARILLO, TEXAS
	ASARCO Incorporated				Baltimore, MD				ASBA				* ASARCO BALTIMORE, MARYLAND
	ASARCO Incorporated				Perth Amboy, NJ				ASCP				* AS & R CO. - PERTH AMBOY, N.J.
	ASARCO Incorporated				Perth Amboy, NJ				ASPA				* ASARCO-PERTH AMBOY, NEW JERSEY
	ASARCO Incorporated				Selby, CA				SGSR				* SELBY GOLD & SILVER REFINERY, SAN FRANCISCO, CAL.
	Britannia Refined Metals Co.				Northfleet, England				BLCO				BLCo.
	Broken Hill Associated Smelters Pty. Ltd.				Port Pirie, Australia				BHAS				BHAS
	Cerro de Pasco Corporation				La Oroya, Peru				CDPP				* C de P PERU
	Cominco Ltd.				Trail, British Columbia				TADA				TADANAC
	Compania de Real Monte y Pachuca				Pachuca, Mexico				RDMM				R del M
	Comptoir Lyon-Alemand Louyot				Noisy le Sec, France				CLAP				* COMPTOIR-LYON-ALEMAND, LOUYOT & CIE-PARIS
	Comptoir Lyon-Alemand Louyot				Noisy le Sec, France				CLAL				COMPTOIR-LYON-ALEMAND, LOUYOT-PARIS
	Dowa Mining Co., Ltd.				Kosaka City, Japan				DOWA				DOWA (with crossed hammers within circle)
	Empresa Minera del Peru SA				La Oroya, Peru				CPPE				CP-PERU
	Engelhard Corporation				Chessington, England				ENCI				* ENGELHARD LONDON
	Engelhard Corporation				Carteret, NJ				ENNE				* ENGELHARD
	Engelhard Corporation				Ivry, France				ECMP				* ENGELHARD (with Compagnie Des Metaux Precieux-Paris within an oval)
	Furukawa Metals Co., Ltd.				Nikko City, Japan				TRIA				OPEN TRIANGLE (like letter A, brand name "Yamaichi")
	Golden West Refining Corporation Limited, Handy & Harman Refining Group, Inc.				Attleboro, MA				GWHH				* HH HANDY & HARMAN REFINING
	Handy & Harman				Attleboro, MA				HAND				* HH HANDY & HARMAN SILVER
	Handy & Harman				Fairfield, CT				HARM				* HH HANDY & HARMAN SILVER (with capital letter F bars produced at Fairfield, Conn.)
	INCO Limited				Sudbury, Ontario				ORCO				ORC
	Industrial Minera Mexico SA				Monterrey, Mexico				ASMO				* ASARCO-MONTERREY
	Industrial Minera Mexico SA				Monterrey, Mexico				IMMM				IMM-MONTERREY
	Johnson Matthey Chemicals, Ltd.				Royston, England				JMLO				* JOHNSON MATTHEY LONDON
	Johnson Matthey Chemicals, Ltd.				Royston, England				JMCF				* JMCF
	Johnson Matthey Limited				Brampton, Ontario				JMLT				JM and crossed hammers in diamond surrounded by JOHNSON MATTHEY CANADA
	Johnson Matthey Limited				Brampton, Ontario				JMJM				* JOHNSON MATTHEY-JM (with crossed hammers and assay stamp: JM LTD.-CANADA-ASSAY OFFICE)
	Johnson Matthey Limited				Brampton, Ontario				JMCA				* JM (with crossed hammers)
	Johnson Matthey Limited				Brampton, Ontario				JMMC				* J.M. & M. Ltd.
	Johnson Matthey Refining, Inc.				Salt Lake City, UT				JMRI				JOHNSON MATTHEY-JM (with crossed hammers and assay stamp:J.M.R.I.-U.S.A.-ASSAY OFFICE)
	Kam-Kotia Mines, Ltd.				Cobalt, Ontario				CRKO				* CRK
	Kennecott Corporation				Magna, UT				KUEU				* KUE
	Met-Mex Penoles, SA de CV				Monterrey, Mexico				MPSA				* METALURGICA MEXICANA PENOLES S.A.
	Met-Mex Penoles, SA de CV				Torreon, Mexico				POPM				PRODUCT OF PENOLES MEXICO
	Metalli Preziosi S.p.A.				Milan, Italy				MPSP				METALLI PREZIOSI S.p.A. MILANO (with MP)
	Metalor Precieux SA Metalor				Neuchatel, Switzerland				MPOR				METAUX PRECIEUX SA METALOR (in a circle with letters MP in center)
	Metalor Technologies USA Corp.				N. Attleboro, MA				MUST				METALOR® (with "MUS" assay mark)
	Metalor Technologies USA Corp.				N. Attleboro, MA				META				* METAUX PRECIEUX SA METALOR (in a circle with letters MUS in center)
	Mitsubishi Materials Corporation				Kagawa, Japan				DIAM				Three diamonds forming a triangle
	No. 1 Mining Corporation				Namtu, Burma				BRMA				BURMA MINES
	Noranda Metallurgy, Inc. – Copper				Montreal East, Quebec				CCRL				CCR CANADA
	Norddeutsche Affinerie A.G.				Hamburg, W. Germany				NAHA				NORDDEUTSCHE AFFINERIE HAMBURG
	PAMP S.A.				Castel San Pietro, Switzerland				PAMP				PAMP
	PGP Industries, Inc.				Duncan, SC				PGPI				PGP
	Rand Refinery Limited				Germiston, Transvaal				RRSA				RAND REFINERY LTD. (with RR Ltd. on underside)
	Rudarsko Metalursko Hemijski Kombinat, Trepca				Zvecan, Yugoslavia				TREP				TREPCA
	Sabin Metal Corporation				Scottsville, NY				SABN				SMC
	Sheffield Smelting Co., Ltd.				Sheffield, England				SSCL				* THE SHEFFIELD SMELTING CO. LTD.
	The Anaconda Company				Perth Amboy, NJ				UMCO				* UMS CO.
	The Bunker Hill Company				Kellogg, ID				HILL				* BUNKER HILL
	U.S. Smelting, Refining & Mining				East Chicago, IL				USSC				* USSCO
	Umicore AG & Co. KG				Hanau, Germany				DEGU				* DEGUSSA (with 1/2 sun and 1/4 moon within diamond)
	Umicore AG & Co. KG				South Plainfield, NJ				METZ				* DEGUSSA (with 1/2 sun and 1/4 moon within diamond, also Metz est. 1921)
	United States Assay Office				Denver, Colorado				USDE				* SEAL OF UNITED STATES (with year and location of production)
	United States Assay Office				New York, NY				USNY				* SEAL OF UNITED STATES (with year and location of production)
	United States Assay Office				Philadelphia, PA				USPH				* SEAL OF UNITED STATES (with year and location of production)
	United States Assay Office				San Francisco, CA				USSF				* SEAL OF UNITED STATES (with year and location of production)
	United States Metals Refining Co., a division of Amax Copper, Inc.				Carteret, NJ				DRW				* DRW
	Zaklady Metalurginczne Trzebinia				Trzebinia, Poland				ZTMP				ZTM
	n.v. Union Miniere s.a. – Business Unit Hoboken				Hoboken, Belgium				MHOV				* HOBOKEN 999.7+
	n.v. Union Miniere s.a. – Business Unit Hoboken				Hoboken, Belgium				HOBN				HOBOKEN 999+

(1) Brands which are no longer produced are preceded by an asterisk (*).