From the 240/200/Gazelle FAQ (
http://www.emergent.com.au/200sx/faq_1.html):
"Export market cars have pop-up lights (which makes them RS or RPS13's), while the domestic cars have fixed rectangular lights. When the S14 was introduced, the S13 was renamed a PS13 "180SX" (with pop-up lights) and continues to be sold in Japan."
Hmm...