Couple of small questions about Laboval series ?

[kalleboy]

Hello
I write in English(Google translate and highschool Deutch won't go :-) )...
Still need some small info about it.
Zeiss Laboval 1,2,3,4,...(Germany DDR)
- Can someone tell the years of manufacture(started-ended) for these different versions ?
- If possible: What new and better came with each one ? (Or are they equally good ?)
- I have Laboval 2 and a serial 734963 is stamped on it. Can I decode the manufacture month/year with the serial like in car tires ?
Additional questions:
+ Where can I buy lamp centering hex/square keys. Name of the tool: silver colored ? (2 tiny screws near lamp)
+ What is this accessory found on google searching pictures...(Is it a lamp filter ?)

[JB]

Hi Kalle,

I don't know all the models. This is what I noticed:

Laboval 1 has a clip-on light source. http://www.uvarov-optics.com/images/41-2.gif
Laboval 2 got a light source that is integrated in the microscope base.
Laboval 4 was improved by replacing the combination focus drive (Laboval 1+2) with a focus mechanism that had separate main and fine focus controls. http://www.lichtquellen.de/bio/CZJ_Labo.jpg

The accessory is a filter that was placed in front of the light source (looks like a frosted glass plate).

Regards,

Jon

[Gerd Schmahl]

Hallo,
mal diese beiden Varianten probieren, die in diesem Thread vorgeschlagen wurden. Die Schlüssel werden auch relativ oft bei e-bay (Deutschland) angeboten. Aber bitte messe vorher nochmal die Vierkante aus! Ich denke, es sollte die gleiche Größe sein (1,2..1,3mm). Es gab aber auch noch größere.
Grüße
Gerd