I know the older 26" models are somewhat different from the new models, but wondering how a 26" model (old or new) can be identified from just a picture. I've been keeping my eye out for a 26" on CL and most posts don't say what size they are, even though I know there's 99% chance it's not a 26". Just trying to learn how to easily identify them without having to contact the poster on CL. Thanks.