Wayback machine list of Stratum 2:

http://web.archive.org/web/19970605192059/http://www.eecis.udel.edu/~mills/ntp/clock2.html

Updated to list ntp.maths.tcd.ie, ntp.cs.tcd.ie and ntp.tcd.ie

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A version of Stratum 2 servers from  August 1995

	https://groups.google.com/g/pipex.dialup/c/4Sa7yUUheaw/m/EJehSqFQCBAJ

Lists ashe, lib1 and salmon. Posted 1996

Mails in 1995 show servers on public list.

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1991 - dmills mentions 23 primary and 23 secondary

https://groups.google.com/g/comp.protocols.time.ntp/c/UHUWYuo4YhQ/m/YqgI_PQrZPsJ

Unlikely TCD servers are in this list, as IP connectivity appears about 1991.

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In 
	https://downloads.nwtime.org/ntp/3.4/

the ntp-test.tar.Z file has a man/clock.txt file dated 1 March 1989.
No servers in Ireland at this time.