Mystery Arm Badges ?

[Hawthorn]

Good Morning to you all,

Another mystery photograph I have picked up over the years and wondered if anyone could shed any light on the Unit of the Man shown. Not a very clear photograph I'm afraid but he appears to be wearing two separate arm badges, the bottom of the two looks like a '1' or 'I' but I can't work out the top one. Any help would be greatly appreciated.

By the way, not for sale at the moment, just trying to identify photographs I have had for years.

Regards Simon.