From the Philatelic Bureau, Sri Lanka (online)
http://www.slpost.gov.lk/philatelic...e=show&id=16Composite stamps: are those which together make a design, se-tenant but usually in the form of a block.
Se-tenant: refers to two or more stamps of different designs, which are an unseparated pair or strip. Quite frequently, the strip makes the complete design, each individual stamp depicting a part of the motif.
There is no real word to designate a block of se-tenant stamps, at least as far as I haven't heard.

Describing when selling I would use the word(s) se-tenant , maybe composite if you have room, as I haven't heard that word before used with stamps but some may have, depending of where in the world they are.
You could also, maybe, use the world mini-sheet or miniature sheet, although in the rest of the world this means souvenir sheet really.
Maybe mini-pane is better.
Use the term 'complete picture' perhaps also. people like the word complete.
This is a great little block, designed well, lots of details and interest.
Birds, lighthouse, is that a ship?, fishing, fishermen, a Jeep, flora and fauna (plants and animals).
Remember, a title in an online auction, especially
ebay or Bidstart is more for people searching than for looking good or for readability. You can use all the proper English you want in your description. Titles are for grabbing attention and getting people to click.
Just the facts Ma'am.

edit: added link