Identify high current LED Package name
The package is called by different trade names by companies,  

Lumileds Corp calls them "Barracuda",
while
Osram Opto. calls them "Dragon".





The important feature of the package is a heat-conducting metal center, the "heatsink slug", that can be soldered onto a larger heatsink below:




For details and source, see the chapter on LED packaging of the somewhat-retired LED-related website Light-Emitting-Diodes-dot-org - (note different domain).

See the bottom-left image: Chapter 11: Packaging - Fig 11.5.

A possible reason for not having a clear type code for this package could be that it was not actually a LED package, but just a more generic heatsink-with-extra-plastic-lens.


*Barracuda was, at least initially, actually referring to the type of LED die itself, not the package. See ledmuseum.candlepower.us and  Philips LED Update - page 8