391 
VEB CARL ZEISS JENA 
JENA made 
Seconds Theodolite ’Théo 010’" 
Angle measuring instrument with extended reflecting telescope with 
almost total elimination of the secondary spectrum, for triangulation 
2nd to 4th order, precision polygon measurements above and below 
ground level, astronomical junction measurements. Standard error 
one direction measured once in both telescope positions maximum 
(± 1"),31 X telescope magnification. 
Representatives in all parts of the ivorld