No serial number or maker's mark is visible on this movement, but the tune-sheet, which has been numbered 150, and is of a style found on Bremond and also Heller boxes. The bird movements are controlled by four keys between the reed and pipe sections of the key frame.
One bell tooth is broken (possibly a non-functional one, as its position does not seem to correspond with the one non-working striker) and one bass comb tooth. There is also a tip off at the bass end, and a series of tips at the upper end of the bass comb. These, however, appear to be filed off rather than broken, and alternate with whole tips, suggesting a maker's intention - a part alternate tips comb? The corresponding section of the cylinder is the most heavily pinned, and the comb teeth are abnormally closely-spaced for a twelve-tune arrangement.
The movement appears to have been fitted originally with a tune indicator and a tune selector, but neither is present