Jen,
If it came from a mixed pen like that, you really shouldnt call it anything but a hi spalding. It can be very hard to tell a 15/16 and a pure apart. and if it had a pure male and a 7/8 hen, that's just what I'd have to call it, 15/16 spalding.
Like Deerman said, it is EXTREMELY hard to tell sex on these til they are older, if you had two, you could compare spur lenght and get a good guess, but with out one it'll be hard.
How old it it?
How long are the spurs?
Legs look good and long which is indicative of male, but hens are leggy too, thickness of them tells a lot.
Based off what my boys looked like as yearling (now at 2 where I know they are boys) I would suggest male, but they can trick you on these green birds.