Fire Brigade pump S.E.B. – Société pour l’Exploitation des procédés Boullon, based in Puteaux, Paris (France). In the first half of the 20th century, SEB built various types of motor pumps for firefighting and civil protection.
Nice clean unit. Inside nice numbers, threads are good. Spins smoothly. Convex glass with a few scratches. Outer bezel has imperfections between the 50 & 90 mark. I have more photos.