XTR Acoustic Guitar Capo Curved Black with Bridge Pin Puller
XTR GPX55B Clamp-Style Curved Acoustic Capo
These are a solid and affordable capo option. It's designed to get around most acoustic and electric guitar necks. They're spring operated and feature a black finish with soft silicon cushions for string contact. Curved for comfort with a notch for pulling bridge pins during string changes. Handy!
Anyway, here's Wonderwall.