Hi Paul,
Can you prove a close-up photo of the left side frame markings...? This would confirm your 1908 1st. Issue...cannot see in the photos you have provided so far...Also...if a 1908 1st. Issue, the right side frame should be absent any markings/proofs...which I think your right-side photo does...
Regards,
Pete... <img border="0" alt="[typing]" title="" src="graemlins/yltype.gif" />