For a display that depends on connected stamp designs, confirm the arrangement and the joins, not just the number of different designs. Two offers can contain the same designs and quantities while supporting different layouts. Ask what will actually remain attached in the supplied material before planning around a catalog picture.
What se-tenant describes
The American Philatelic Society vocabulary uses se-tenant for different designs that remain joined together. It is a relationship between attached stamps. A group of loose pieces showing different designs does not establish that relationship merely because the pieces are photographed side by side.
Use the term as a question when the offered arrangement is unknown. The Earth Day catalog reference, PDD-002, asks buyers to confirm sheet count and total pieces. Its title does not establish a particular se-tenant configuration, intact panel or current stock. Request the actual offered format rather than assigning it a specialist description from the title.
A design list cannot answer adjacency
Consider an imaginary display requiring designs A and B. Offer one contains two loose A pieces and two loose B pieces. Offer two contains two attached A-B pairs. Both descriptions contain four pieces and two design types, but only the second description specifies the joins needed for that particular paired display. These letters and quantities are an illustration, not a description of any listed product.
Orientation matters too. A horizontal A-B pair is not the same presentation as A above B. If the display requires a particular sequence, identify that sequence and ask whether the offered material meets it. Do not assume that rotating the display would be acceptable to the person preparing the exhibit.
Request an adjacency map with the photographs
Start with an overview showing the entire proposed panel or group. Give positions simple references such as top-left and bottom-right, or row and column numbers. Record which design occupies each position and which neighboring positions are joined. For a larger arrangement, a marked copy of a reference image can communicate the question, provided it is clearly labeled as a requested layout rather than proof of the goods.
Ask the supplier to identify which joins are intact in the actual offer. If an edge is obscured by overlapping pieces or packaging, leave that connection unconfirmed. Do not infer a continuous panel from a photograph in which separate pieces have been placed close together. Ask for clarification without requesting cutting, peeling or other alteration.
Keep arrangement, quantity and dimensions separate
The design-level contents guide helps record which subjects are represented. Use it for presence and repetition questions. The arrangement record adds a different answer: how the relevant pieces are physically connected. A complete list of designs does not automatically mean the desired connected arrangement is available.
Once the proposed layout is established, use the whole-sheet footprint guide to request actual outside dimensions. Neither the adjacency map nor the piece count supplies a reliable frame measurement. Mounting and preservation decisions also require their own review.
For adjacent designs facing opposite ways, use the tête-bêche layout guide to distinguish relative orientation from a supported production-error claim.
Put the layout requirement into the inquiry
Send the catalog reference, desired sequence, orientation and number of connected units through the inquiry channel. State whether separated pieces would be acceptable or would fail the intended display requirement. Ask for offer-specific evidence and keep any unanswered joins marked pending. This process documents the requested arrangement; it does not certify authenticity, condition, postal eligibility or availability.