** Shares of Walchandnagar Industries WALC.NS rise as much as 7.7% to 158.96 rupees
** Heavy engineering firm says workers' lockout at its Maharashtra plant called off; operations to start from December 20 in phases
** Lockout and work suspension at the plant since March 20 led to 270 million rupees ($3.03 million) of revenue loss - WALC
** Stock on course to snap five straight session of losses, during which it fell 12%
** WALC last up 5%, set for best day in nearly a month
** Stock down 46% so far in 2025
($1 = 89.2450 Indian rupees)
(Reporting by Nishit Navin in Bengaluru)
((nishit.navin@thomsonreuters.com))