Yes, those are the second series 55 bearings. Also, they DO NOT need shims- - - -they either work or they don't, no shimmimg allowed. If the top bearing shell doesn't have a dowel, the bearing is installed without shimming for adjusting clearance being an option. If the hole in the block is accurate and you've got a properly reground crankshaft, shimming shouldn't be needed.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!