Buy Mustache for ink. S.XX

Beautiful nickel-plated steel mustache for the ink of the Second Half of the 20th Century. It would probably belong to a box of measures. It consists of two pieces. Cuff and arms in one piece. The sleeve is nickel-plated steel. It can be unscrewed from the arms. The opening of the mustache, that is to say, the distance between both arms, is graduated by means of a wheel resting on a small ring, inserted in a threaded bolt with a stop at its other end, and that crosses the two arms.
The bolt is fixed to the opposite arm by means of a microbulb, which allows it to turn. This distance is what allows you to set the radius of the circle you want to draw.
In the needle arm, it is placed on the outside of the arm, and is fixed by pressing it with a wheel that is screwed into a threaded pin drilled, in which the needle is inserted.
The tips of the tongues are in very good condition. The distance between tabs is adjusted by means of a wheel that has a threaded bolt that goes through one of the tongues, and is screwed in the opposite one. It has very little oxidation.
Very interesting as a collector"s item. It is convenient to carry out a cleaning, and an adequate treatment for the oxide, which would revalue the piece very remarkably.