RB1970 Oval is the sunglasses counterpart to Ray-Ban's 1970 eyeglass frame, sharing the same oval metal front and 140mm arm length. This aftermarket pair follows that oval curve into the hinge, matching the sunglasses version rather than the prescription 1970V, which is worth checking if you're ordering by model number alone. The RB prefix on the code is the detail that separates the two, since the shape and arm length are otherwise identical between them.

Because the 1970 line comes in both sunglasses and eyeglass versions with the same basic shape, it's easy to end up with an arm that's technically close but not cut for your exact variant. Confirming the RB versus RX code before ordering avoids a hinge that almost fits but sits slightly off. If the box it came in isn't around anymore, checking the tiny engraving on the inside of the temple is usually the fastest way to confirm which version you have.