This is a genuine Nissan digital speedometer. It fits to LHD S13 240SX with digital speedometer cluster.
 
You can try to fix 30 year old clusters on your own, or buy this and never have to worry about it for the next 30 years.
 
Brand new
Genuine Nissan part 24821-54F80
Fits to 91-94 240SX with digital speedometer
Part number also listed as compatible with 89-90 S13 cluster
USDM part - allows for selection between MPH and km/h
Also fits to JDM S13 Silvia