NOTE: You can click on most pictures to get a larger view of them.
The U-34 Cricket Prototype was an experimental precursor to the 23rd Century Romulan Bird Of Prey.
Only two of these style of ships were known to be built. One of them was re-purposed and converted into a tramp cargo ship. The second ship was presumed lost but was later discovered in a boneyard and was salvaged and rebuilt to original specifications.