Knotted beneath the collar of a crisp dress shirt ... to popular practice is not meant for tucking in the small end of the tie; and a "bar tack" stitch which fastens the ends of the seams together.

I have seen chains on the collars ... The tie chain I am familiar with is the latter variety you mentioned, worn lower on the tie. This is a variation on the tie bar in which a chain loops around ...

Collars nowadays are typically narrower, shorter, and have a wider spread to allow for the slimmer fits and lapels that are in style these days. It also lets the tie come off after work ...

The most dapper guys might even suggest that the tie is the centerpiece of a man's look: The shirt collar folds around ... you'll need a few ties with small patterns and subtle colors.