Information about a biplane altimeter

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According to family legend, this German aircraft altimeter was last used on a biplane in 1910. I can't find any more information about its manufacturer: I've looked for the logo of every German company active in aviation at the time whose name begins with an "A", and I can't find the same one.

Do any of you have any more information?

Many thanks

 

[Dave66]

Morning…and welcome to the forum

You have a barograph….similar to the one in the link here…..https://thevintageaviator.co.nz/media-gallery/detail/112/2859

Can’t help with the manufacturer, hopefully someone else with far more technical knowledge than me will be along shortly to cove a more detailed reply….interesting instrument, thanks for sharing.

Dave.

Edited 26 September , 2023 by Dave66

[blabla]

Thank you Dave.

[DavidOwen]

Welcome to the forum

This link may also assist DR1 Barograph (theaerodrome.com)

Someone may recognise the manufacturer's mark.

Good luck with your research

[DavidOwen]

This explains the D.R.G.M. mark PM&M [Resources / Vocabulary / D.R.G.M.] (porcelainmarksandmore.com)

[DavidOwen]

It appears that the records for early DRGM numbers have been lost D.R.G.M Numbers & D.R.P Numbers ????? | NAWCC Forums

[blabla]

Thank you David, it is very interesting.