Same size as a normal ISA connector but "deeper" (2 rows of contact if you could inspect them)? EISA
Full ISA connector (potentially missing the bit in the middle) and then a further piece? VLB
Shorter than ISA but higher density? AGP (it's even a bit shorter than PCI)
Was it at least a Pentium? Can't be AGP otherwise.
Going to ignore PCI-X, PCIE and obscure AGP variants
I was talking about what was on the card itself rather than the interface, because the poster I was responding to mentioned the card, but your point about interfaces is well made.
Back in the day - late 80s, very early 90s - I’d see Amstrad (ugh!) 286-based desktop systems on sale in our local branch of Dixon that included graphics cards fitted with VGA chipsets, but cards compatible with the AGP interface on then newer motherboards didn’t cross my radar until the second half of the 90s.