Can you post an image of it? Also of what is poking down from the underneath? I have an old sink like that (no drainboards, though) but it's a wall mount.

We just had our installed. It acts like a drop in sink as far as the countertop is concerned. The base cabinet was built specifically larger to fit its dimensions.

This is not cehenrich's sink but it may be similar as it too has "things poking down beneath the drainboards". I believe the "things" are designed to rest on matching supports.

antiquehome.org has many pictures of these sinks in print ads showing the front of the sink matching the flow of the front of the countertop and/or installed on top on the metal sink base cabinets where it *is* the countertop.

retrorenovation.com also has *lots* of good info on these types of sinks.

(not to derail the OP but I had hoped to install my sink this past winter. Unfortunately, the rain falling in several rooms made a new roof the priority.) The plan on installation is to add supports from below and the side in the cabinets to match the "things" on the sink. I've wanted to find one of those metal sink bases to see what support was provided but haven't yet found one to look in (either physically or virtually).

hth

Here is a link that might be useful: retrorenovation.com on these sinks