Edit - just got it...seems like you just pry it up...against the arrow. Still would like to know how to swap out the strap.
So I just got my Hamilton Jazzmaster Maestro in the mail - beautiful! But the strap is about 1 hole too big...how in the world do you adjust it? It's got a deployant on it (standard Hamilton one) and for the life of me I cannot figure out how to adjust the size on it. I've been playing with it for nearly 20 minutes now and I haven't managed to figure it out. I would be very grateful if someone could provide instructions (pictures would be incredible). There are markings underneath the buckle with arrows and the word "Open" but no matter which way I try to pry it it won't open up. I'm terrified of using too much force as I would hate to break my (expensive for me) new watch.
On another note, does anyone know how to replace the strap? I also got a brown strap to go with the watch and would like to know how to swap them out. Thanks!