2434xx was made in 1905.
The numbers started that year at 241000. 1906 started at 256000.
Production ended in 1907.
I'm not an expert on these, but only the Model 1889 New Navy models did NOT have locking notches on the outside of the cylinder.
The New Army models had the double locking notches like the one shown.
The Blue Book lists values as follows, but this is only a estimate sicne prices change so fast. Value depends on how much ORIGINAL factory finish remains, and on the gun being in proper working condition:
Tell your friend to treat the gun very gently. These are very complex actions and have a history of getting out of order or breaking easily .
If damaged, the chances of repairs are about non-existent due to the lack of parts and any gunsmith who will even attempt repairs.