You can try to see this SGS Bond Calculator page from MAS for better understanding:
https://www.mas.gov.sg/bonds-and-bi...?issue_code=N521100V&maturity_date=2026-11-01
For such reopened bonds, the coupon rate is already set. Instead, the price/yield at which you buy the bond varies.
And also you must account for accrued interest, which is the interest accumulated between the last payment date and the next payment date. For this case, the payment dates are 1 May and 1 Nov every year, so it is the accrued interest from 1 May to 3 Jun, the issue date.
Keying in Settlement Date 3 Jun 2024 and Price of $95, I get Yield to Maturity of 3.43% pa and Estimated Amount You Will Pay as $951.10 for $1k worth of the bond.
It means you are paying $951.10 now for $1k face value of the bond. You will receive interest of $6.25 on 1 Nov 2024, 1 May 2025, 1 Nov 2025, 1 May 2026 and 1 Nov 2026 [i.e. $12.50 per $1k per year or 1.25% pa], and the principal of $1k on 1 Nov 2026.
If you find this too confusing, best not to deal with reopened SGS bonds. Just go for alternatives like SSB or FD.