there are two versions of the euro lights
the squares and the round version. Both use an H4 bulb
square version. If you look closely you can tell the W123 on the left( euro 280CE) has euro spec coupe bumpers which do not have bumper shocks and do not stick out as far as US Spec bumpers
US Specs
round euro spec lights
(one piece glass lense)
You Have
US Spec sealed beams and US Spec "park bench" bumpers