April 9 (Reuters) - Stanmore Coal Ltd SMR.AX :
* SALEABLE COAL PRODUCTION OF 691KT IN MARCH QUARTER
* SAYS FULL YEAR PRODUCTION GUIDANCE LIFTED TO 2.3MT PRODUCT
* FULL YEAR UNDERLYING EBITDA GUIDANCE MAINTAINED AT $140M TO $155M
* SEES FULL YEAR UNDERLYING FOB COST GUIDANCE OF $88/T
* MARCH QUARTER COAL SALES OF 740KT VERSUS 404 KT