This is a King Silvertone 2B trombone.   The bell serial number is 180377 which approximately it around 1935 if I'm reading the chart right. the slide is not matching...it's number is 383104.

  It's in very nice condition.  I've been using it for the past 10 yrs.   Gorgeous tone.   The slide needs some work as it's not as free moving as I'd like it to be.    There's some corrosion on the stocking.     The bell has 2 very small dings .     And some of the shine is beginning to wear near the shoulder area.    Still very pretty horn.

I don't have a case for it.   Will be wrapped and shipped carefully.

   Buyer pays $40 shipping.