Identify the RB2BE101 part
22mm Push Buttons
ZB2 Push Buttons
The old Telemecanique p/n was ZB2BE101. The RB2BE101 is a clone made by a company called Shamrock who use to make Schneider contact blocks until the agreement ran out. Then they made them under the RB2BE101p/n.
To find replacements for old part numbers, refer to the cross reference page: https://tools.se.app/xref/index.html