▁Mod ifications ▁The ▁original ▁sl atted ▁upper ▁sides ▁of ▁the ▁Type ▁SH ▁tender ' s ▁coal ▁b unker ▁were ▁soon ▁replaced ▁by ▁sheet - met al ▁sides . ▁The ▁sheet - met al ▁to ps ▁appear ▁to ▁have ▁not ▁been ▁uniform ▁in ▁dimensions , ▁with ▁some ▁extending ▁further ▁towards ▁the ▁rear ▁end ▁of ▁the ▁tender ▁than ▁others . ▁ ▁Reb u ild ing ▁to ▁Type ▁SK ▁From ▁c . ▁ 1 9 2 5 , ▁several ▁of ▁the ▁Type ▁SH ▁tend ers ▁were ▁completely ▁re built ▁by ▁the ▁S AR ▁by ▁mount ing ▁a ▁new ▁upper ▁structure ▁on ▁the ▁existing ▁under frame , ▁with ▁larger ▁water ▁t anks ▁and ▁a ▁larger ▁coal ▁capacity . ▁These ▁re built ▁tend ers ▁had ▁a ▁more ▁modern ▁appearance , ▁with ▁smooth ▁sides ▁all ▁the ▁way ▁to ▁the ▁top ▁of ▁the ▁coal ▁b unker . ▁They ▁were ▁designated ▁Type ▁SK . ▁ ▁The ▁program ▁to ▁re build ▁several ▁older ▁tender ▁types ▁with ▁new ▁upper ▁structures ▁was ▁begun ▁by ▁Col ▁F . R . ▁Collins ▁D SO , ▁who ▁approved ▁several ▁of ▁the ▁detailed ▁draw ings ▁for ▁the ▁work ▁during ▁his ▁term ▁in ▁office ▁as ▁Chief ▁Mechan ical ▁Engine er ▁of ▁the ▁S AR ▁from ▁ 1 9 2 2 ▁to ▁ 1 9 2 9 . ▁It ▁was ▁continued ▁by ▁his ▁successor , ▁A . G . ▁Watson . ▁ ▁Ill ustration ▁ ▁References ▁ ▁SH <0x0A> </s> ▁Alfonso ▁II ▁d ' E ste ▁( 2 4 ▁November ▁ 1 5 3 3 ▁– ▁ 2 7 ▁October