We wish the caption identified the aircraft but, alas, it doesn’t. Might get that from the museum’s website? Two of these GW 336 cards are available.  One was mailed in 1991, stamp intact but heavily postmarked. Corner creasing (Grade: 3, $4).  The other was mailed in 1986 with Selangor stamp and heavy but legible postmark (Grade: 1, $4.50).