what breed am I??

hello, I am new to the forum. I have used a recent photo of my dog, One, as my profile picture. I have had him since he was 7 weeks old. We are from Canada. I got hi as an English Staffordshire Terrier however I do not think he is truly that. He is taller and longer legged than staffies I have met and has a short turned up nose. I love him regardless but really would love to know about his true identity!!! Could he be a Valley bulldog (boxer-staff cross??)

What do the experts think he is. THESE ARE HIS SPECS!!!!

"One" is brindle, with a feather stripe between the eyes, white on top of his paws. He stands 21-22 inches to the top of his back and 25-26 inches to the top of his head. He is 6 and half years old and weighs in at 55 pounds (the heaviest he has been).

THANKS FOR YOUR HELP!!

Adrian