Try egunparts, gun shows, gun shops
The original manufacture of the Iver Johnson Model 55 Target pistol maybe able to provide an owners manual. The manual will have instructions on what is need to maintain the product.
If you don't have a manual, you will need a good gunsmith
We need the model- there is more than 1 Browning .380 pistol.
I lost owner's manual You need to check the owner's manual.
It depends on the model
You will need to contact the factory.
This would be a Browning Challenger .22 pistol made in 1970.
Would need the model to answer.
If you want an answer then you need to state the model number and the condition of the pistol. Also is it still working?
Need the name of the maker to answer.
Would need to know the model to answer.
Will need model name to answer.