Lawrence Music Transposer

Click on the next links to see professional panoramic pictures of the Music Transposer Rule:

https://www.sliderulemuseum.com/Lawrence/Lawrence_9-K_MusicTransposer_DavidRanceCollection.jpg

Rance, David G: Slide Rules are (Still) Music To My Ears: https://sliderules.nl/media/papers/Slide_Rules_Are_%28Still%29_Music_To_My_Ears_-_IM2006.pdf