Here is a color comparison of yellow glazes compared to butterscotch (a sub-category of brown). The top two rows are actual (true) yellows while the bottom two rows are various shades of butterscotch. Top row = NN, PP Inc. (dated ink stamped on crown), Chance (ink stamped on crown), PP (incuse in box on crown) 2nd row = Victor (incuse V in box on skirt), NN, NN, Cook (incuse on dome) 3rd row = Pinco (incuse on dome/crown), Hartford (incuse on crown), Locke 44 (incuse on skirt), NN (attributed to Triangle M) Bottom row = Locke 44 (incuse on skirt), Victor (incuse V in box on skirt), Hartford (incuse on crown)