I've got a set of parts for an LR that I've been meaning to put back on. The first use of this tank was on the Interpol police models as the police customers insisted on a steel tank and at that time, all Commandos were glass fibre. Presumably having modified the base to fit the Commando frame, it seemed worthwhile marketing it. It does give a comfortable riding position with a reasonable range but isn't the most stylish Commando.
The tanks turn up now and again in the UK but are not as common as the Interpol variants which had radio pommels or cutouts. LRs were catalogued in Racing Green or Signal red but I did see an NOS in black which may have been for a radio-less Police order, maybe overseas as I have a feeling that UK forces were all using white by then.
Although the tank was still available into the era of the double coil bracket, it really needs to be fitted with the earlier single bracket set-up or it will clash. I once spoke with a first owner who had run his with a piece of rubber wedged between since he'd first had it. The poor fit suggests perhaps that at the end, the LR was a bit of a special order thing rather than a full production model.