Which hammer type will give me this effect?

[china]

I don't think any fancy hammer has been used to achieve that finish, looks to me more like a casting and just a rough as guts finishing job wit a file or similar.

[gaylecath]

Thanks everyone for your help

@Dennis I think my problem was watching 2 hours of videos about Fretz hammers, they pulled me into their cult...

@China I did suspect it could be a casting. The jeweller in question has very much promoted her pieces as hand-hammered, so I hoped maybe they were

I will go with a (reasonably priced!) planishing hammer for now, and then attack it with a file

[NickD]

I don't think any fancy hammer has been used to achieve that finish, looks to me more like a casting and just a rough as guts finishing job wit a file or similar.

Second that. It looks to me as though it's been whacked with anything but a planishing hammer.
Nick