Walther GSP Magazine Question

Will the current Walther GSP Expert magazines fit my 1990 (2 stage trigger) GSP? The website at Champions Choice says they won't fit older models, but are they talking pre 1972? Was there a design change in 2020? I emailed Champions but they never responded. I contacted Earls but they didn't answer the fit question. They only said they have new mags in stock. At $75 apiece I'd like to know for sure.

See if they are returnable. If you have the square magazine well, they may fit. Older well were round in the front.

Call Earl’s Repair Service, they will be able to answer your question and provide parts. They are a Walther factory direct representative in US. Earl has been very helpful to me with my GSP. http://carlwalther.com/