The Organ Historical Society offers is Travel-Orgue 2021 Calendar.
This calendar features never before published convention instrument photos from Connecticut, Massachusetts, Ohio, Pennsylvania, and Washington, D.C. Photography by Len Levasseur.
Instruments by Geo. S. Hutchings, Farrand & Votey, William Schuelke Organ Co., Stevens & Jewett, Henry Erben, Rudolf von Beckerath, Hilborne L. Roosevelt, Casavant Frères, Wirsching Organ Co., W.W. Kimball Co., and E. & G.G. Hook & Hastings.
$25 non members, $21 members. www.organhistoricalsociety.org.
https://organhistoricalsociety.org/product/ohs-2021-pipe-organ-calendar/
Other recent publications:
John Geib & Sons, Organ Builders and Piano Forte Manufacturers
