Eastern Arms was a Sears Roebuck trade name and the only reference I find listing a .38 revolver says they were made by Meriden Arms, which was a Sears subsidiary and in business only from c. 1905-1915. If your gun has grips marked Forhand Arms, I'd bet that the whole gun was made by that company and marked with the Sears name. That would agree with your estimate of the age as the Forehand name was used from 1890 to 1902. The only top-break .38 Revolver I find listed is the "Perfection Automatic" but my references disagree on the exact dates of production. The Standard Catalog of Firearms says 1898-1902 while The 1983 Official Price Guide says they were all made before 1899. The Standard Catalog suggests a value of $150 in NRA Very Good condition. I don't think the Eastern name would affect the value either way.
10-100 usd
The value of a IV FR Johnsons arms 32 caliber Fitchburg mass revolver is actually dependent upon a number of factors. Most important of these factors would be the condition of the revolver.
10-100 USD or so
It is a small short barreled .32 caliber revolver made by Charter Arms, value about $125-$175, depending on condition.
30-60 USD or so
10-100 USD or so
value depends on overall condition, however, the rosco has little value...........
20-60 USD or so
@ 100 USD
A large revolver
It should be marked on the barrel.
@ turn of the century; less than 100 USD