This is possibly the most popular & well-remembered set from the WADDINGTON/Letraset spot colour Panoramas. You can see why…
A popular misconception is that this is one of Letraset's monochrome sets; it isn't. The Panoramas in this group each have four spot colours, apart from this one & "Fairytale Landscape"; these two each have two sheets of two spot colours (black & white). At first glance it may appear that one of the sheets is entirely white, but in fact the registration marks & serial numbers are in black.
Here's a detail to directly compare similar figures from the two sheets:
