inkstand with letter scale

The maker of this silver letter scale with inkstand is unknown to me. The letter scale model is typically French, see for example the previously shown letter scale of Narcisse Briais. The letter scale was heavily oxidized when purchased and the upright was broken, a wooden stick connected the broken parts. Both jars and one of the four feet were missing from the ink set. At the bottom of the page are photos of the letter scale set when purchased. On a gamble, I bought yet another incomplete ink set on the internet. It did have two jars, one for sand and one for ink, and four feet. Unfortunately, the caps of both jars were missing. Those jars appear to fit exactly in the holes of the incomplete ink set with letter scale. Then everything is disassembled. The silver parts have been cleaned and brought back to shine. The upright has been repaired with a piece of stainless steel tube in the upright and some soft solder. The missing fourth foot has been placed.
Some lines are engraved in the silver round base of the letter scale. At the top, a partly readable Dutch text line, the first word is: ZANGKOOR followed by probably the name of that choir, which I can't read yet. Below it reads: 1862 5/10 1887. This points to a twenty-fifth anniversary in 1887. Whether the founding date is October 5 (5/10) or May 10 remains unclear for the time being. I don't know if there is a database on Dutch choirs, I'd love to hear about it.
The letter scale weighs up to 100, there is no indication for grams on the scale. The scale still shows the former postal weight limit of 7½ grams, this weight limit was never used in the Netherlands. The wooden base measures 27 x 19 centimeters. The tip of the upright is the highest point and is 22.5 centimeters high. The largest diameter of the silver base is 7.7 centimeters.
Below are many more images of this incomplete but still beautiful silver jubilee inkstand with letter scale.