SB Šu'illa Prayer to Shamash 1 (o1-16, r1-20), rubric (r21). The small flake STT 233 joins to this tablet and has been incorporated into the material below at rev. 10-15. See Gurney 1981-82: 93 for the unnumbered flake that fills in the last several lines on the reverse. The tablet was not available in the Anatolian Civilizations Museum in Ankara when I photographed the tablets for this project. I was told it was on loan to a local museum in Urfa in 2015. I have therefore not been able to collate this tablet.
