there is the style explanation of 《書學正韻》 in 《欽定四庫全書總目》：

https://ctext.org/library.pl?if=gb&file=60663&page=115&remap=gb

According to “所列之字兼存篆隸二體”, each character should have 2 glyphs in the book. It would be helpful showing whole page of the evidence to see what the seal script of this character is.