Vintage stove clock Minute minder Circa 1940's - painted enamel

An interesting piece of kitchenalia.  Still in working condition.    I have wound it up to the 15min mark and it works as long as its kept in an upright position, so I cant guarantee it will continue to do this as its probably about 80 years old!!!.    At the end of 15 mins a short brrr rings to signal time is up.     I am not 100% sure but from a little research it appears to be from a 1940’s stove although I stand for correction.   Someone has made a box for it which works well for standing up / displaying in.   It appears to be cream enamel under the white paint and would probably look good cleaned off.  The clock face is also enamel and in good condition.

Please dont hesitate to ask any questions.