Earlier 1100's had the chrome trimmed rear light unit, stainless side strips and different upper rear quarter panels with a Chrome hockey stick trim, bigger 'pan lid' wheel trims, later cars like yours ( and mine) get stripped back a bit, R10 wheel centres, although we lost the strip Speedo and gained round dials.
I don't year of changeover, or lineage of models, but there's lots of little differences between year and model, country of origin ( Dacia 1100 included , FASA drum breaked cars) I'm not an expert on them, and every day is a school day.
Congratulations on quick turnaround, I'd swop out to 20/50 when you're happy with lump, cos you can get your cock between some of the engine clearances....well I can....I mean could