Origin of the American phrase getting down to brass tacks

Q: When people prepare to discuss serious business, they often say they’re “getting down to brass tacks.” Why tacks? Why brass?

Advanced English Vocabulary Native Speakers Use — Spring Cleaning

A thread about the phrase “let's get down to brass tacks.” : r/MurderedByWords

What could a US recession mean for gold and gold equities?

A thread about the phrase “let's get down to brass tacks.” : r/MurderedByWords

Get Down to Brass Tacks What Does this Helpful Idiom Mean? • 7ESL

Get Down to Brass Tacks What Does this Helpful Idiom Mean? • 7ESL

Waging War(s): Formation of the AIDS Committee of Toronto

What is the origin of the phrase 'getting down to brass tacks'? What exactly is the phrase meant to convey? - Quora

What is the origin of the phrase 'getting down to brass tacks'? What exactly is the phrase meant to convey? - Quora

Checks and Balances - Definition, Examples & Constitution

Collectors profile: Brass Tacks - The Magazine Antiques

The Proud History Behind the Come and Take it Flag