I asked about the logo of the Bavaria anchor bow roller manufacturer:
(http://www.dolcetto.org.uk/forum-images/Roller-Logo.png)
A logo that says "NP" using a Micrometer (or Callipers, or a Clamp) plus the word "Germany" in an irregular octagon.
The answer is Niro Petersen (http://www.niro-petersen.de/en/home.html)
You can download the Niro Petersen catalogue on this page (http://www.niro-petersen.de/fileadmin/flippingbook/katalog/index.html). Click the down-pointing arrow between the Printer and the Speaker symbols. It's called ?Herunterladen? (Download in German).
Thanks, Nigel, interesting catalogue - huge range of stuff. I like the look of some of the hinges especially.