Lost a screw. If my memory serves me correctly It's one of the ones that attach to blades. They're an older model, does anyone know where I can purchase replacement/what screw I need to buy? Thanks
If you look at Peasridge, a company that sells & services clippers you may find they sell the part you want. Try the link below that will take you to the Lister Meteor parts.
How come you have lost the screw? That clipper's blades are not supposed to be taken apart. If you need to remove the blades you push them off with your thumb. This will push off the entire comb/cutter/locator/spring/yoke/screws assembly. The above link tells you all you need to know. Part Number 258-34830. You may have trouble assembling the blade on the clipper. if so, you may need to take the cutter, yoke, locator and spring off of the clipper, re assemble it and push it back on the clipper as per instructions below.
Parts Diagram & Numbers: http://www.sheareaseltd.com/wp-content/uploads/2014/01/Meteor1.pdf
Instructions: http://www.sheareaseltd.com/wp-content/uploads/2014/01/Meteor.pdf
That's usually the case. Push the whole thing off next time! Not only is the possibility of re-assembly problem eliminated that way, if the blade has to be re tensioned for any reason then this can be done by whoever sharpens your blades.