Your revolver is 9 shot revolver any speed loader made for a 9 shot 22 revolver might work but I have never seen such a thing
Value seldom exceeds 100 USD
No such S&W model number.
We have one on eBay right now. Item # 250128267184
The value of an Iver Johnson Magnum 22 caliber revolver would be dependent upon a number of factors. Some of these factors would be the age and condition.
The value of an 1896 Iver Johnson 22 caliber 7 shot revolver is dependent upon a number of factors. The condition of the revolver would need to be taken highly into consideration when determining the value.
No more than 50 USD, and for that it would have to be NIB.
5-200 USD or more depending on specifics