Guys, please forgive me while I continue to play with "photobucket" at your expense!
The first shot shows a Diana 27 made in 1926. The second photo has a 1981-vintage model 27 with RWS markings on top, and a Nazi-era "DRP"-marked model 27 below.
All three guns shoot very well. The oldsters both have walnut stocks, and the DRP gun a fabulous 2-stage trigger.
It's worth noting that all 3 guns are completely different from one another, with no parts in common. Diana has a tendency to keep the same model name for guns that are roughly the same size and power as a famous predecessor.