Make: Martin
| Model: Master "Typewriter"
| Pitch: Bb Tenor
| Finish: Silver Plated
Serial #: 10235x
| Date: 1930
Source: www.ebay.com
Comment: Typewriters have pearl button touches where other models have rectangular palm keys and the same for left and right "pinky" and octave keys
Make: Martin
| Model: Master "Typewriter"
| Pitch: Bb Tenor
| Finish: Silver Plated
Serial #: 95xxx
| Date: 1929
Source: www.ebay.com
Comment: Typewriters have pearl button touches where other models have rectangular palm keys and the same for left and right "pinky" and octave keys
Make: Martin
| Model: Master "Typewriter"
| Pitch: Bb Tenor
| Finish: Silver Plated
Serial #: 9821x
| Date: 1929
Source: www.ebay.com
Comment: Typewriters have pearl button touches where other models have rectangular palm keys and the same for left and right "pinky" and octave keys