Scope - yes, wobulator - no.
It was so needed for me that I had no choice.
An year befor scope I have made an chronocomparator. Not sure of English name - the device you put electronic watch on its small table and it shows you its offset with resolution ±0.1s/day (I’ve got absolute accuracy probably about ± 0.5s/day). It was the beginning of electronic watches time (at least here in Poland) and people imported the chippest once. Many of them just haven’t the trimmer in them. Then they went to service to do something as their watch has offset more then a minute per day. My known service-man had a problem how to regulate it after inserting the trimmer. He asked customers to come, and come, and come - day after day, made some changes, noted and so on. He showed me (not his) professional such device (I could’t open it as it was sealed (at guarantee)) and we agreed that I will do something like that. I’ve got for it 2,5 times my fathers month salary.
When I told him how hard it was for me to do it haveing no scope he offered me one old, broken down tube scope. I used its housing, main tube and trafo and build the rest (with transistors and some TTL ICs) myself.