I don't think I ever met anyone who doesn't like the Diana 27--simple, sturdy, utterly un-fancy, but superb quality where you need it. An RWS 27 was one of the first "serious" airguns I bought years ago--Ladd Fanta's classic 1977 Gun Digest article pushed me over the edge--and I'd never part with it.
A few more 27's have come to live here since then. This shot shows (top to bottom) four distinctly different generations--the original "Millita" style gun (this one dated 1926); a Nazi-era "DRP" marked, ca. 1935 rifle with its marvelous striker-type adjustable trigger; a first-generation post-WW2 rifle from the late 1950's; and the classic modern gun from 1981 with RWS markings.
I most recently acquired the 1950's gun, and this is quite interesting to compare to the DRP example. Many smaller parts (sights, screws, etc.) actually appear to be identical, as does--believe it or not--the entire receiver tube! Even though the internal workings, including the classic post-war ball-sear trigger, are quite different, they are in fact quite cleverly engineered around these older bits.
I've heard quality light rifles like this called "walkaround guns"--a wonderfully descriptive term! With apologies to R7 fans, the 27's superb balance, easy-carrying slender stock, and extra measure of power make it the all-time walkaround king in my book.