Been doing a bit of measuring for you. My Status S2000 has the same bridge piece as your Washburn. The string spacing at the bridge measures at 17mm whereas my Hohner measures at 18mm. I presume the Hohner and your Steinberger have the same bridge/tuner system.
Most Status 5ers have 18mm spacing unless otherwise specified by original purchaser or you if you buy new. Headless Status basses use the mono rail tuners so a new bass can have any spacing you want for a small extra charge. I have seen some older Status fivers, like Empathys, with 16mm spacing. They use the same kind of bridge/tuning system to your Washburn but fitted for five strings. Hope that's of some use.