Most prewar Gibson banjos came equipped with either a one-piece or a two-piece armrest. Two-piece armrests are generally found on tube and plate flange banjos. In 1929, the one-piece (or “single-piece”) armrest was introduced and installed on one-piece flange banjos.
One-piece armrest with bolt and bar
Underside of one-piece armrest. Note the dull plating, which is characteristic of prewar armrests.
The bottom piece of these armrests were soldered to the top, hence the “two-piece” name.
Two-Piece Armrest
These armrests were used on all top tension models (7, 12, and 18).
Top Tension Armrest
Like other hardware, armrests were normally plated with nickel, gold, or chrome.
Nickel, Gold (Granada), and Chrome One-Piece Armrests