These threads are my current favorites for working 17th century metal stitches such as the plaited braid, reverse chain, ceylon, ladder and working backgrounds in Gobelin stitches.
Gilt Special Tambour (on cotton), Gilt 6-end silk and 90% Silver 6-end silk. The 6-end silk is slightly thinner than the special tambour.
These three threads were made for me so I could work goblin stitch for the backgrounds of 17th century pieces. Many sweet bags have this treatment. The Gilt Special Tambour also makes a very fine and pleasing plaited braid.
A note on amounts. The finer threads are sold by grams and I do not know the exact number of meters for each. I can give a guide: A tube of Special Tambour will cover approximately 26 square inches of linen in half cross over two.