Research Tools

Power Search

The most powerful search engine in philately. Search all of our auctions from 1993 to date, plus our Rarities sales since their inception in 1964, as well as some important older name sales.

The Siegel Encyclopedia

Informative articles giving the historical background and context for the use of different stamps, designs and denominations.

Census Data

Comprehensive census information on some of the rarest United States stamps. Andrew Titley is also compiling data on some of the rarest worldwide stamps.

Exhibits and Mounted Collections

Exhibits and mounted collections are an excellent way of conveying original research, and of showing different ways of mounting one's collection.

The Arthur White Postal History Archive

This remarkable collection of PDF files contains thousands of covers to destinations around the world. The markings are carefully illustrated and described, and the rates and routes are clearly explained. This is an excellent resource for learning how to decipher postal history.

PSE Population Report

Automatically updated weekly, this allows you to check the current population report of any graded stamp. Follow the links to see a graph of pricing history for the SMQ catalogue value and realizations from past Siegel sales.

Today in History

Research whether any important historical events occurred on a certain day

Perpetual Calendar

Useful for dating postal history items

Currency Converter

Convert between any currencies at today's exchange rate. Also contains some historical exchange rate information

The Curtis Collection

The Curtis Collection census, started by Dan Curtis in the 1990's, was expanded and maintained with the capable assistance of Bill Buker. Siegel Auction Galleries has assumed responsibility for hosting and maintaining this indispensable resource for future collectors.

Comprehensive website devoted to Hawaiian philately.

Authentication Committees

The Philatelic Foundation

Non-profit, specializes in United States stamps.

Professional Stamp Experts

Specializes in United States stamps, leading firm for grading

Confederate Stamp Alliance

Expertizing arm of the Confederate Stamp Society

American Philatelic Society

Expertizing arm of the American Philatelic Society

Vincent Graves Greene Foundation

Canada's premier BNA expertizing service

Worldwide Experts

Website with the most comprehensive list of worldwide philatelic experts we have found


Linn's Stamp News

Weekly Publication


American Philatelic Society

The largest collector's organization in the United States. Their site offers links to hundreds of affiliated specialized collecting organizations, and has schedules for upcoming shows.

American Stamp Dealer's Association

Main governing body for members of the stamp trade

Collector's Club of New York

Founded in 1896, the Collector's Club of New York is located in a landmark five-story brownstone, designed by famed architect Stanford White, located at 35th Street and Madison Avenue in New York City. Their goal is to further the study of philately, promote the hobby and provide a social, educational, and non-commercial setting for the enthusiastic enjoyment of our common passion.

Royal Philatelic Society of London

Oldest philatelic society in the world. Founded in 1869, permission to use the prefix 'Royal' was granted by His Majesty King Edward VII in 1906. It was ten years earlier that his son, HRH The Duke of York, became President of the Society, an office he continued to hold until his accession to the throne as HM King George V in 1910.

Collector's Club of Chicago

A great resource library from one of America's leading collector organizations

Carriers and Locals Society

Website devoted to this collecting area, publishers of the Penny Post.

Confederate Stamp Alliance

Premier organization for Confederate philately

U.S. Philatelic Classics Society

Classics Society, a great resource for research on classic U.S. stamps. Publishes The Chronicle, a quarterly publication

The Manuscript Society

An international society whose members cover all fields of autograph collecting.

Libraries and Institutions

National Postal Museum

Link to the Smithsonian's National Postal Museum website

The British Library

Link to information about their philatelic collections


James E. Lee

Jim Lee's website, specializing in philatelic literature

Philatelic Bibliopole

Philatelic literature dealer Leonard Hartmann's website

Philip Bansner

Phil Bansner's website, specializing in philatelic literature