Frock Coat - 1790 - The Victoria and Albert Museum
1820-1840 gentleman's clothing
1830's-1830's Men's tailcoat. Notice the under-vest, clearly visible underneath the waistcoat - you can tell that only a small section of the vest is constructed from a fashion fabric, the rest is muslin.
Regency Tailcoat - Black with Velvet Trim  - Victor's formalwear - except with a red vest.