Help on makers mark M inside triangle sterling enamel swordfish brooch

[lxn5696]

I've done an internet search in the last hour or so and have not found anything that references a triangle with an M inside next to "sterling"  I have front/back pictures, although slightly blurry ... any information would be greatly appreciated.

Thanks so much for all the wisdom what is shared here!

[okon2]

All I found was MAyer LS germany,  

[lxn5696]

Thanks okon2, I'll try searching for that! Appreciate the response greatly!