Se-tenant

Se-tenant (pronounced “suh-tuh-NAHN” or anglicised as “suh-TEN-ant”) is a French term meaning “holding together.” In philately it describes two or more stamps that differ from each other in design, value, colour, or all three, yet are joined as they came from the original printing. Se-tenants occur because postal authorities choose to print multiple related designs — or multiple denominations — within the same sheet or booklet pane, resulting in stamps that are physically adjacent and share perforations between them.

Types of Se-tenant Combinations

Se-tenant pairs are the simplest form: two different stamps side by side. The US “Love” and holiday stamp issues have frequently appeared as se-tenant pairs. British commemorative sets have included se-tenant pairs where two stamps form a composite illustration.

Se-tenant strips extend the combination to three or more stamps in a horizontal or vertical row. The US “Space Achievement” issue of 1981 featured an eight-stamp se-tenant strip that formed a panoramic illustration of the solar system — one of the landmark US se-tenant designs.

Se-tenant blocks are rectangular groups of four or more stamps in which adjacent stamps in both directions differ from each other. The US Wildflowers sheet of 1992, with 50 different designs in a single sheet, creates se-tenant combinations in every direction across the full sheet.

Se-tenant booklet panes occur in stamp booklets where the pane contains two or more different designs. British Machin coil stamps and booklet panes frequently include se-tenant combinations of different denominations to facilitate exact postage.

Famous Se-tenant Examples

The GB “Peasants’ Revolt” and “British Explorers” series of the 1970s and 1980s were issued in se-tenant blocks of four. The US “Bicentennial” issues of 1976 included se-tenant blocks of four showing different aspects of colonial life. More recently, Royal Mail’s “Classic Locomotives,” “Classic Cars,” and numerous other commemorative sets have been issued as se-tenant strips where the stamp designs link together visually.

Why Se-tenants Must Not Be Separated

This is the cardinal rule: se-tenant stamps lose significant value if separated. A se-tenant pair is catalogued as a unit — the catalogue value for the pair is much higher than the sum of the two individual stamps, because the joined unit is what was originally issued. Separating a se-tenant pair destroys this philatelic integrity permanently. Even the perf holes between the stamps — once torn — cannot be restored. For blocks and strips, separation is even more damaging, both to the individual pieces and to the narrative the design intended.

How to Store Se-tenants

Because se-tenants are wider than a single stamp, standard-sized mounts and pockets are usually too small. Options include:

• Oversized stamp mounts cut from strip mount material to the exact width and height of the combination
• Glassine folded pockets for temporary storage during sorting
• Dedicated se-tenant album pages with larger pockets
• Stockbooks with wider horizontal strips that accommodate pairs and strips without folding

The stamp or combination should never be folded, bent, or inserted into a pocket too small to accommodate it without stress to the perforations.

Identifying Original Se-tenants

Occasionally, separated stamps that happen to have the same perforation gauge and paper are placed side by side to simulate a se-tenant pair. To identify a genuine se-tenant, check that the shared perforations between the two stamps are integral — the holes should form a continuous line with no disruption — and that the paper and gum across the join are consistent. Any sign of reperforating along the shared edge is a major red flag. For valuable se-tenant blocks or strips, expertisation is advisable.