Make: Martin
| Model: Master "Typewriter"
| Pitch: Eb Alto
| Finish: Lacquer/Brass
Serial #: 10007x
| 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: Lacquer/Brass
Serial #: 100xxx
| 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: Lacquer/Brass
Serial #: unknown
| 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: Lacquer/Brass
Serial #: 96xxx
| 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: Lacquer/Brass
Serial #: unknown
| Date: 1929 - 30
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.