In 1958, the coin hobby needed a grading guide and that need was met by A Guide to the Grading of United States Coins by Martin R. Brown and John W. Dunn. The 1958 paperback edition had photos to illustrate coin types and written description for eight circulated coin grades. By the hardbound fourth edition (1964), published by Whitman, the grades were illustrated with line drawings. A seventh edition was published in 1980.

The line drawings were by Racine artist Arthur Mueller. He also did the drawings for the Standard Guide to Grading Canadian Coins.

The authors also collaborated on Market Value Index for Circulating United States Coins in 1962.

American Numismatic Biographies has very brief biographies for the authors.

I thought the authors deserved a better memory so I dug a little deeper.

Martin Richard Brown was the son of Grover Cleveland Brown (1883-1956) and Emma D. Brown (1883-1960).

M. R. Brown joined the ANA in 1936 as member 5508 and began to run ads in The Numismatist in 1938. He served as vice-president of the Oklahoma City Coin Club in 1939. He continued in business as Brown's Coins and Stamps.

As a bit of a distraction, dealer M. Ralph Brown from Albuquerque, New Mexico, joined the ANA in 1942 as member 8868. He made contributions in the study of Mexican numismatics. Unfortunately, in the Centennial History of the ANA, author Bowers identifies M. Ralph Brown as the co-author of the grading book.

Martin and Antonia Brown are buried at Resthaven Gardens Cemetery in Oklahoma City.

Researching John W. Dunn proved to be quite a challenge. John Wallace Dunn, John William Dunn and John William Wallace Dunn are multi-generational names and more than one have connections in Oklahoma.

John Wallace Dunn was the son of the Reverend Wallace Alexander Dunn (1870-1940) and Lessie I. Morland Dunn (1877-1961). The family moved frequently, never appearing at the same location for the census. His children with Dorothy were Lessie B. Dunn, named for his mother and John Wallace Dunn, Jr.

John W. Dunn joined the ANA as member 25156 in 1956. He served as vice-president of the Oklahoma City Coin Club in 1956 and produced a design for the club medal in 1958. Dunn was president of the Sooner Coin Club in Norman in 1960. He served on committees and made educational presentations for the ANA.

Dunn was a more prolific writer than Brown. He was a member of the Numismatic Literary Guild and wrote about various topics including Indian Trade Tokens of Oklahoma.

John W. Dunn was a theater professor at the University of Oklahoma and Director of the WPA Federal Theater Project in Oklahoma. He is credited as author of which appears to have been written for puppets. He was also affiliated with the Oklahoma Educational Television Authority and director of stations KOKH and WNAD.

John W. Dunn is buried at Sunset Memorial Park in Norman, Oklahoma. Blanche Lazelle Loughlin Dunn remarried and is buried in another cemetery in Norman.