Massey bikes were one of he original companies that started CCM at the turn of the century. Gibson pedals are aluminum and if you look at the back of them where they bolt to the crank there should be a pattent date. I think it is July 10 1922 if I remember. If there are no dates on them or any markings they will be the earlier ones. I think they started making them in 1915 and dated them after 1922. The double top tubes started in 1922 or 23. If you check the date chart in the earlier posting you will find what year it is. The wrap around headbadge is very nice. I have a later Massey bike, I cannot remember what year but maybe 40's. Mine has a small Massey headbadge but it does not wrap around. Check your rear hub for markings. CCM made changes over the years. 1926 up to 1937 used the 1926 Hercules hub with Hercules in writing. I believe the earlier Hercules was in printing. After 1937 CCM used the 37 CCM hub.