It is actually a Lucas LRS121 B90 and it's just that I've found a 1991 recon' unit which is supposed to fit - on a number of Renault models according to the box including - R4, R5, R6, R8, R10, R12, R15 and also Volvo (DAF) 66 but am not 100% sure it is for the 1.1 ?
Here is a pic - and it looks the same as far as I remember ?