Here's a grouping of three CD 134 Hemingray No.18's with various dome sizes.

- The dome on the left piece is ~2.75" wide.

- The dome in the middle piece is ~2.9" wide (I typically see this one being sold as the [070] 162 dome variant)

- The dome on the right piece is ~3.05" wide.

The widest one is the only one I consider to be the true [070] 162 dome variant, as it is closest to the CD 162 dome sizes of the SDP Hemingray-blue era (around 3.0-3.2"). Note how the wire ridge juts out past the body, while the others are mostly parallel to or smaller than the body.

If anyone out there has one with a dome wider than 3.05", please let me know!