Bottle base with letters

ianhoutsianhouts
in Question and Answer
I have a plain bottle dug up near the docks in Portsmouth which has NMM pressed in the base of the bottle. I would be grateful if anyone could help in explaining what the letters refer to.
Many thanks

Comments

  • ChrisChris
    As always, a photo of the bottle would be helpful. In this case, the country you found the bottle may help someone ID it.

    I did look through "Bottle Makers and Their Marks" but found no listing for NMM
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