I have several shaves for inside curved work. The "classic" is called the Cigar shave by Millers Falls. In actuality it was patented by Albert Goodell in Feb. 19, 1884 (pat #293651). Millers Falls acquired Goodell in the late 1800's.
Here are some of my shaves:
Curved Shaves Top.jpgCurved Shaves Bottom.jpg
From top to bottom:
Small unmarked bronze. Curved both directions. Good for dished surfaces. Flat blade.
Lie-Nielsen small bronze curved bottom. Fairly flat curvature. Flat blade. Well made.
Stanley #67 with curved sole (flat available). Removable handles - can be used for rabbets. Flat blade.
Millers Falls "Cigar" small diameter (about 5/8"). Curved blade. Works well.
Modern copy. Larger handles than MF, but body the same. Curved blade (Interchangable with MF) Works well.
Source: ebay item 331385929259 Made very well.
WoodJoy 5/8" diameter. Flat blade with micro-adjust. Made very well. Works well.