Stainless steel chronograph
This watch is not the Deep Sea B pictured above from the line book. Note that the lug ends on this watch are curved slightly downward while the "B" variant is straight. I think the watch presented here is a Bulova Deep Sea Chronograph like THIS ONE, the difference being the "666" marking missing from the dial and wearing what appears to be a replacement bezel ring. The bezels are rather difficult to find as stated above. Several different ones recently sold on eBay but none that match the original for your watch. This is a very nice Bulova, I'd service it and clean it up a bit and wear it every day - it's a survivor!
1971 Bulova Deep Sea Chronograph (no variant for this one)
In reply to This watch is not the Deep… by Geoff Baker
In reply to Agree with Bulova Deep Sea… by Andersok