Calbe is the former chemical division of ORWO; the film production
division became Efke.  ORWO was the East German company derived from the
original Agfa company; the company we know today as Agfa was started by
engineers and technicians from the old Agfa who escaped to the West
during or after the war and subsequently managed to gain control of the
company name during Cold War years.

Their R09 developer is close to "traditional Rodinal" while Agfa Rodinal
has been altered through the years in unpublished ways; there is little
or no photographic difference between them, according to experts who
have tested both.

The A49 is the same as Atomal from before WWII; it was/is a fine grain
developer similar in some respects to Microdol.  As such, it may not
work well with some modern films (my reading suggests dichroic fog may
be a problem due to excessive solvent action), but likely works well
with Efke and probably Foma films, which are for the most part similar
to films of the 1940s and 1950s.

 It is Calbe RO9 or R09; that last is a zero. It is a Rodinal type.
A49, IMMSMC, ( if my memory serves me correctly ), is the Calbe
via Foma.                                                       Dan

Am 2004-05-01,
schrieb Neil Purling <sextant@sextant.karoo.co.uk>:

I would say, that the differences between Agfa Rodinal and Calbe R 09
are nearly similar to the differences between Kodak D76 and Ilford
ID-11.

And for A49, there is no similar product from Agfa anymore.

Yes.

It's comparable to Microdol X.

At http://www.calbe-fotochemie.com/ you can download all data sheets for
these chemicals.

Alex