I believe that all USDM CRXs had the seatbelts in the door....i could be wrong tho. I know for a fact that at least all 89-91 USDM Si CRXs have them in the door

I'm almost positive that JDM CR-Xs have the seat belts that
are not in the door.
__________________
FLINT BLACK 1990 CRX SI
Appearance Mods:
-JDM EF8 CR-X SiR Spoiler
-94/95 Integra GS-R rims
Performance Mods:
-JDM B18C swap
-OBD1 conversion
-Chipped P28 ECU
-Skunk2 Intake Manifold
-DC Sports 4-2-1 Header
-MSD SCI-L ignition
-EXEDY Racing Clutch
Interior Mod
-'95 Integra GS-R Gauge Cluster
Former Motors - RIP:
-JDM B16A #1- Blew up due to over-revving
-JDM B16A #2 - Hydrolocked
Former Cars
'89 CRX Si - "The Bumblebee"
'94 Integra GS-R
'96 Camaro