I have the same logo as yours on my 1979 Stingray (with the encircled R)...
The bridge is, of course, an excellent indicator of authenticity, because of its unique features, but the stamps and pot date codes are way more precise, especially the stamps. 😉
At this price tag, it should be a good idea to have these details photographed as I'm sure a connoisseur buyer will ask for these, so being proactive doesn't harm. 😉😉😉