図鑑 · The Atlas Show Baltimore-Washington Pen Show Linthicum (BWI), MD, United States When March · annual Organizer Bert Oser (Bertram's Inkwell) Website baltimorepenshow.com Recorded from the organizer's site Verified 26 September 2026 Correct this entry Follow Baltimore-Washington Pen Show One note when something changes here. Nothing else. Follow Check your inbox to confirm.