&lt;Service Control Corp> said it hasstarted a tender offer for all shares of &lt;American Service
Corp> at 37 dlrs each.
    In a newspaper advertisement, the company said the offer
and withdrawal rights expire April Nine unless extended.  The
American Service board has approved the offer, which is to be
followed by a merger at the same price.
    Service Control said the offer is conditioned on receipt of
at least 534,806 shares.  It said holders of 534,819 shares
have agreed to tender their shares under the offer and have
granted Service Control an option to buy them at 37 dlrs each.
 Reuter
