Square like the TS-ER series? I believe i have a NOS DR tacho. Can you tell me the the RPM range and where redline starts and i will check if its right. I think its a ND make. There was also the same gauges made by Nippon Seiki. I bought it for a TS but its wrong for my bikes. Pretty sure it is for a DR. Had no part number with it when i bought it.
I have seen the DR-S ones on ebay Germany/Austria in recent times.