Make: Martin
| Model: Master "Typewriter"
| Pitch: Eb Alto
| Finish: Silver Plated
Serial #: 100322
| 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: Eb Alto
| Finish: Silver Plated
Serial #: 9585x
| 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: Eb Alto
| Finish: Silver Plated (replated)
Serial #: 9745x
| 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: Eb Alto
| Finish: Silver Plated
Serial #: 9869x
| 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: Eb Alto
| Finish: Silver Plated
Serial #: 98xxx
| Date: 1929
Source: www.saxophone.org
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: Eb Alto
| Finish: Silver Plated
Serial #: 98xxx
| 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: Eb Alto
| Finish: Silver Plated
Serial #: unknown
| Date: n/a
Source: www.cybersax.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: Eb Alto
| Finish: Silver Plated
Serial #: unknown
| Date: n/a
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