Doctor Who season 17 Frock coats -- what trim was used


New Member
Hi, I need a little help from any one who has seen the City of Death coat live. I have been making a modified version for personal use. I know most of the materials: light brown Harris tweed, chocolate brown cotton velvet for the collar, leather soccer buttons, but the trim is confounding me. What is it made of? Sometimes I look and it seems like it is velvet, but I'm never sure. I know it is not the cotton bias tape that normally abounds.

Can anyone help?