Finland 1928 Domestic Covers

Some years ago, I bought a large collection of Finnish domestic covers, all sent to the same address in Helsinki in 1928.

I've only just found time to start going through them and I find I have large numbers with machine cancels.

As I'm only interested in village and small town circular datestamps, I have no use for them. Please let me know if you would be interested in swapping something you have for the following:

Bulk lot of covers cancelled in Helsinki (57 all up) - see sample cover; or a mix of ten or twenty covers from Helsinki and other larger places like Kuopio, Lahti, Tampere, Tornio and Turku.

I'm very open to any kind of swap.

In addition to stamps, I collect old covers from Europe, Australia, and New Zealand, old postcards, etc.