Series 1, 2, 3 to GP

I bought this saddle on eBay after the description said it’d work on a S3. The front hinge mount fits the standard hole pattern however the seat is just too large all around. Measures 26” long (2” longer than aftermarket repop saddle) and 10” wide (1” wider Thant repop). The rear latch pin location is also different from stock Li.

Anyone able to ID what this would fit on? Bummed it won’t work on my S3  because the patina is perfect.