Whale's Jaw Bones

I'm having to take it easy now after the excitement of having my haircut (after six months), finding out my local supermarket does washing up liquid refills  (extra)  and finding a whalebone arch on the way back from the pharmacist. 
Apparently the whalebone arch is over 100 years old and bus conductors used to call out  "Whales Jaw Bones",  when approaching the nearby bus stop. I bet the driver doesn't do that now.