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ECOBRA RIETZ Models 1510 & 1511
( 25 cm Scales )
Model 1511 made of Aluminum Alloy ...
ECOBRA, Nuernberg / Germany (1955/60)
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S A L E S of the ALL METAL R I E T Z Models 1510 & 1511
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Front Side [ inverse / RED ] Back Side
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( 0 ... 25 cm Ruler )
K X3
A X2
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B X2 S sin(0.1X)
[CI] [1/X]
C X T tan(0.1X)
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D X
L lgX
( 0 ... 10" Ruler )
R E M A R K S :
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Both models came in a dark-red cardboard case. The SRs are made
of aluminum. Model 1511 was oxidized and powdery on the edges
and the slider was locked. For the restoration it had to be dis-
assembled, oxidized layers scratched away and VASELINE applied.
Model 1511
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has a surface of white enamel. Scales & figures are printed and
burned into. One body part is screwed into the ends.
Model 1510
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has a "plain" aluminum surface. Scales & figures are engraved and
colored. Both body parts are rivited into the ends ...
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... it looks like a REISS