Earlier, "BTIZ" wrote:

but the ASW has a "Type Data Certificate"
issued by the country where built.
I guess that would be "LBA".

The ultralight Sparrowhawk does not

The foreign certification of the ASW-20 has no bearing on the lack of
US certification of these ships. For whatever reason, Schleicher
declined to seek US type certification. Individual aircraft of this
type operate in the US under special airworthiness certificates as
Experimental, Racing or Exhibition aircraft.

I guess that the better example in this case is indeed the Zuni. It
also was manufactured in series production, does not hold type
certification anywhere, and all examples operate under special
airworthiness certificates as Experimental, Racing or Exhibition
aircraft.

Bob K.