Interference microscope, "JENAVAL Interphako" (Germany, Democratic Republic 1989)

16 May (Germany, Democratic Republic ) within release 100 years Carl-Zeiss-Foundation, Jena goes into circulation Stamp Interference microscope, "JENAVAL Interphako" face value 50 East German pfennig

Stamp Interference microscope, "JENAVAL Interphako" in catalogues
Michel:	Mi:DDR 3252
Yvert et Tellier:	Yt:DDR 2861

Stamp is vertical format.

Also in the issue 100 years Carl-Zeiss-Foundation, Jena:

• Se-tenant - Tenant of optical instruments face value 135;
• Stamp - Interference microscope, "JENAVAL Interphako" face value 50;
• Stamp - Twice-coordinates-gauge ZKM 01-250 C face value 85;
• Se-tenant - Tenant of optical instruments face value 135;
• Se-tenant - Tenant of optical instruments face value 135;
• Stamp - Tenant of optical instruments face value 85;
• Se-tenant - Tenant of optical instruments face value 135;
• Stamp - Tenant of optical instruments face value 50;