These are no relation to the 3702 speaker. If you look at the front grille of the 3705 it is from an earlier time - the logo and the cloth are very different. They are closer in appearance to the earliest 5000 from the late 60s - probably this was part of the replacement speaker range for the Type S, B and M.
I do not have the 3705 in any of my catalogues - but I can't find my one from the 60s at present!
The grille on the 3702, 3800, 5700 etc is dark black and the front has a small plate B&O logo that can be turned if the speaker is mounted either vertically or horizontally.
Brian