Help with some unit IDs

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Hi, cleaning out the cupboards and found these. Would appreciate any help with what type of unit these are and dates associated with them. They look to be early TR period/early 30's? Also, what is the award being wore by the man with the sweet moustache?

Thanks in advance...

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Up close

The medal

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Next unit

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Backside

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Next unit

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All are Postcards, sorry if the scans are not great Thanks again

[stross]

Any help would be appreciated!!