The 137mm height Showgard mount in Clear Backing provides heavy-duty protection with a fully transparent finish. At an extended 264mm length, this is one of the largest strips available, designed to hold tall and wide philatelic items while allowing the background of your album page to remain visible.
This specialized size is primarily used for United Nations Souvenir Sheets (Large), the 1953 Great Britain Coronation issues, and modern U.S. Unfolded Booklet Panes.
Seamless Display: The all-clear design is perfect for collectors who want their stamps to blend into the page layout without the heavy contrast of a black border.
Archival Preservation: Like all Showgard mounts, these are made from 100% oriented polystyrene. They are acid-free, sulfur-free, and contain no plasticizers, ensuring your stamp's gum and color are preserved for decades.
Structural Twin-Webbing: Despite the significant 137mm vertical span, Showgard’s patented double-seam technology securely holds the item at the top and bottom. This prevents sagging while maintaining the airflow needed to prevent moisture damage.
Customizable Extra-Long Strip: The 10.4-inch (264mm) length is roughly an inch longer than standard strips, providing enough material to house oversized panes or be cut into multiple custom-sized mounts.
Safe Top-Hinge Adhesion: The reverse side is pre-gummed; by moistening only the top edge, you create a secure hinge on the album page, keeping moisture and adhesive isolated from the stamp.
| Feature | Details |
| Product Code | #137C (Clear) |
| Mount Height | 137mm |
| Strip Length | 264mm |
| Backing Color | Transparent / Clear |
| Primary Uses | UN Souvenir Sheets, GB Coronation, Large Modern Panes |
| Quantity | 5 Strips per pack |
The 137mm size is a perfect fit for the U.S. 1993 AIDS Awareness unfolded booklet pane (#2806b). Because this is a very tall and heavy mount, always apply firm pressure across the entire top gummed strip when mounting to ensure it doesn't "peel" away from the page under its own weight over time.