 To cater more specifically to the church market, Hammond introduced the Concert Model E in July 1937, which included a full 32-note pedalboard and four electric switches known as toe pistons, allowing various sounds to be selected by the feet.The model E was replaced by the model RT in 1949, which retained the full-sized pedalboard, but otherwise was internally identical to the B and C models.RT-2 and RT-3 models subsequently appeared in line with the B-2/C-2 and B-3/C-3, respectively.