Sperber Senior Sailplane Model Kit
Resin Model Kit
Scale: 1:72
Wing Span of Full Size Glider: 16 m (52.5 feet)
Wing Span: 22.2 cm (8.7 inches)
Length: 8.5 cm (3.4 inches)
1936 single-seat German sport glider 
The kit includes a complete airframe and assembly instructions, but no decals.

The excellent book Sailplanes 1920 - 1945 by Martin Simons includes an excellent write-up, photos and scale drawings of this glider.  A quote from the book, "In 1936 Jacobs designed an improved and enlarged version of the Rhönsperber, the Sperber Senior.  Despite the name this was really a new design with a different, double tapered wing of greater span, less cambered airfoil sections and entirely new fuselage and tail unit.  Only one was built."