K.A. Abdul Gafoor, J.

Both the petitioners in this case had temporary service under R.9(a)(i) on advice through Employment Exchange, as High School Assistants. Their services were terminated on the expiry of their provisional appointments. Later, both of them were recruited through Public Service Commission as Primary Departmental Teachers, a post lower than to that of High School Assistant (H.S.A.) on 28.1.77 and 21.2.1977 respectively. They continued in the post as per orders In force. They were promoted on regular basis as H.S. As. as per Exts. P1 and P2 dated 23.9.77 and 7.1.78 respectively. Thus, they became H.S. As. Taking the temporary service that they had put in even much prior to the regular appointment in the lower post of Primary Departmental Teacher, the increment due to the petitioners in the promoted post of H.S.A. was sanctioned. Later the error in reckoning the temporary service as H.S.A. which the petitioners had put in before their entry in service in the lower category of P.D. teacher on regular basis, for the purpose of granting increment after promotion as H.S. As from the lower post was detected and Exts. P3 and P4 were issued directing refixation