It's one of the classic sailing ship kits. Though it isn't in the current Revell-Monogram catalog (scarcely any ship kits are), it's still available from Revell Germany.
Here's the kit's history, from the bible on the subject, Thomas Graham's
Remembering Revell Model Kits. It originally appeared in 1959, with no sails. In that original issue it was molded in black, brown, and white plastic, with the bottom of the hull halves pre-painted copper. The kit included two spools of thread, two sizes of brass chain, and a tube of cement. That first issue also included gears connecting the steering wheel to the rudder. (Those parts were later omitted - perhaps because the mechanism didn't work well.) With a price of $10.00, it was the biggest, most expensive product in the Revell line - and probably the most luxurious plastic kit on the market.
The kit was reissued several times under its original name, sometimes with a set of vacuum-formed plastic "sails." Mr. Graham gives the reissue dates as 1966, 1974, and 1978. (His data stops in 1979; it's been reissued at least once since then.)
Revell also re-used most of the parts in this kit to make a supposedly different one: the
Thermopylae. (Those two ships actually were quite a bit different in appearance; Revell was notorious for recycling kits that way.) The first
Thermopylae incarnation appeared in 1960. To make the story more complicated, the real
Thermopylae was sold to Portuguese owners late in her life and served as a school ship for the Portuguese navy, under the name
Pedro Nunes. In 1967 Revell issued a kit with that name; it was, to all intents and purposes, identical to the
Thermopylae kit.
As the
Cutty Sark it shows its age a bit, but it's still one of the better plastic sailing ship kits on the market. As a matter of fact there's a nice article about it in the current issue of
Finescale Modeler.