Brodak BY&O props

[Bill Johnson]

I just received the two props pictured below. I'm a little confused about the 13" blade design. It doesn't look like the rest of the BYO line. Any comments?

[Larry Fruits]

Bill,
 The prop at the top, looks very much like a Top Flite Power Prop from years ago.

 Prop at the bottom, looks like the old Y & O props.

 Larry