Vintage German Mirifone Single French Horn in F - Brass

Vintage German Mirifone M35 single F, French Horn bundle with original case and mouthpeice. Horn does play. I dont have time to refirbish. Here is what I see, the bell bottom has dents, all three valves work smoothly and freely and spring back. Stop corks are still in tact on bottom side of valves. I do see a small weld? spot, looks to be done in silver, needs redone, near the third valve as there is a break in the tubing. The features are orginal hard case linned in dark blue velvet feeling material and mouthpiece are included. Mouthpiece stuck in instrament and is engraved "Mirifone F" on outside. The case tag on side says "Mirifone Los Angeles". The silver trim around bell is engraved "Mirifone" and also engraved "made in Germany". Brass is worn and the small neck support needs to be re attached to neck for mouthpiece. Looks to be the number 36 on each of the bottom of valve paddles. I have been trying to find a comparable sale to get an educated price but I can not find ANY. So this leads me to believe this one is a rarity. In addition, I cannot find any serial numbers.