What is this Austro-Hungarian maker?

[Kirils]

Please help identify this maker CM or OM.

[AG2012]

Hi,
The town assay office is ``B`` for Linz.
Maker is unknown to me.
Regards

[Kirils]

Hi,
The town assay office is ``B`` for Linz.
Maker is unknown to me.
Regards

Thank you!

[kjohn]

Hi,
The town assay office is ``B`` for Linz.
Maker is unknown to me.
Regards

Hello,
I have seen this before, do you know why `B` is struck twice? Have seen this very often with 'A' for Vienna -again - why is it struck twice?

[AG2012]

Hi,
Have no idea why it was struck twice.
It is a kind of secondary mark used on detachable or soldered small parts of complex items.Like legs, finials,handles etc.Seen on gold chains,too.Multiple marks on links to prevent tax evasion Cannot give any reference to legislation.

Regards