First, the Andirons may not be antiques, but I do believe they are very old. I picked them up at an estate sale.
I could not find another pair the same. If you look close, the last picture shows that the cast iron legs still have the Puritan metal tags. The cannon balls have about a 3 1/2" diameter. They are very close to 17" tall. The Andirons and legs are heavy. Altogether they weigh close to 24 pounds.
The Andirons seem to be in sections that are stacked. The threader stud at the bottom may extend up threw to the top. I didn't try to take them apart. Also there are the two brass cover pieces and two brass finials like bolts. In the pictures.
One of the threaded studs on the bottom of the brass andirons is bent some, but does not affect the tightening of the legs with the nut. I found the nuts used to attach the legs and they work great.
Thanks for looking and if you have any questions, just message me.
P S I live in Florida and I figure my shipping to Washington State my longest ship. If you live close, I may be able to save you on shipping.