Dutch Silver Cow Creamer hallmarks need identified

[tuarchives]

From this website, I have identified the center hallmarks to be Dutch. The Lion Rampant mark indicates the silver purity or standard = .833 and the Key intruding on the Lion indicates that the object was made for export.

Does anyone know what the first and last hallmarks are?
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[Doos]

Hi,

You are correct.
The one on the left is the makers mark of Gebroeders Niekerk (Brothers Niekerk) of Groningen, used between 1902 and 1927.
I can't make out the one on the right.

Cute milkjug.
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[tuarchives]

Thanks so much! This is a huge help. Now, just one more I need to identify!
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[robin]

hi,
the letter is the letter Q from 1926. It is upside down
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