Germany-DDR 1985 Technical Monuments - Steam Engines

• Label : "Deutsche Post" of the German Democratic Republic; 1985; commemorative stamps of the issue "Technical Monuments - Steam Engines";
  

issue of 2 stamps

Stamp datas:

• Catalogue numbers : Michel: No. 2957-2958; Yvert & Tellier: No. 2581-2582;; Scott: 2486-2487
• Color : multicolored
• Watermark : none
• Nominal value : 10 - 85 (Pfennig)
• Postage validity : 09 July 1985 - 02 October 1990
• Designed by : Detlef Glinski
• Printed by : "Deutsche Wertpapierdruckerei", Leipzig
• Print process : Photogravure on luminescent paper
• Perforation : Comb perforation, K 14
• Print runs :

- 10 (Pfennig) : 24,000,000 in sheets à 50 stamps (10x5)

- 85 (Pfennig) : 2,100,000 in sheets à 50 stamps (5x10)

• Stamp size (printed area of a single stamp without year line): 21.5 x 39.0 mm or 39.0 x 21.5 mm

Stamps of the issue "Technical Monuments - Steam Engines"
(issue of 2 stamps)

Mint stamps

Michel No. 2957, mint

Michel No. 2958, mint

Postmarked stamps

Michel No. 2957, postmarked

Michel No. 2958, postmarked

To the stamp motives:
- 10 (Pfennig): "Bockdampfmaschine" from the firm ""Kamm- und Wollspinnerei Morand & Co.", Gera (Thuringia), 1833
Note:
Stationery "trestle steam engines" (trestle = "Bock-") were relatively widespread in the time of about 1830-1865.
At these the cylinder stands to level earth. The flywheel and the crankshaft will be carried in trestles (= "Böcke")
stored again by columns. The straight guidance of the piston rod occurs about a wide crosshead. The speed was often
regulated about a centrifugal force governor (= "Fliehkraftregler"). Moreover, a food water pump to the kettle supplied with fresh water.
- 85 (Pfennig) : "Balancier-Dampfmaschine" from Freiberg (Saxony), 1848