These are fairly simple cuckoos. I suggest taking the bellows out. This is a newer model ,so they may be glued on.You can pry them off with a putty knife. i like to mark the bellows left or right so they go back on correctly. I also tape the bellow lifting wires to the bellow.
Take the hooks off...
Turn the minute hand to a quarter hour. Watch the quail lever that operates the bellow. It should sound the quail. Next watch the quail count wheel it should rotate. If the cuckoo is working properly you know the wheel is operating properly. It appears the quail lever is not falling in the slots...
The purpose of the putty is to hold wheels , warning pins and cams in place once you have them in the correct position.
I struggle assembling cuckoo/quails and three wheel cuckoos. Simple Regulas and Schatz etc. are no problem. Wiggling pivots into their holes is also no problem.
I am looking for putty to hold wheels etc in place while assembling movements. It may have been called Assemblers Putty many years ago.
There may be something similar. It can't leave any residue on the parts.
I put the plate in the vise so that there is some clearance around the wheel. I use a small punch and lightly tap the wheel off. Another method ,find a pair of pliers where the teeth fit the gear and twist it off very carefully. I leave the wheel attached easy to clean.
Enjoy! Believe me you will get hooked. I am learning how to repair Cuckoos. Fairly complicated. Regula and Schatz are easy. Three weight musical and Cuckoo Quail are fun. Been doing it for a little over a year and still learning!
I just got a cuckoo/quail movement. The front plate is stamped G.G. BERGER. There is a stamp in a circle with a leaf and GHS. Also a 72 stamp. I have never seen one like it. The lever that operates the quail whistle is inside the plates. I assume the 72 represents 1972. It is extremely dirty...