The Roamer 297 watch movement, also known as the CE13, features a modified ETA base plate that is signed as ETA 900. It is equipped with various functions, including manual winding, sub seconds, day setting by changing the 20:15-24h position, and quickset date adjustment by repeated crown pushing. This movement was commonly used around the period of 1950. Details about the differences between the CE3 and CE13 are currently unknown.