The American Singer Sewing machine company moved from Bridgeton to Clydebank in the 1880's. There it had constructed one of the first factories to apply mass production techniques. It was one of the world's biggest. Thousands worked there.
John Maclean wrote about the whole set up in the SDF paper "Justice." He noticed in particullar that only the skilled male workers were unionised.
In 1911 3000 women did come out on strike. They wanted union recognition and increased pay. Unskilled and largely non-unionised male workers followed them. Amongst them were Marxists from the Socialist Labour Party who backed industrial unionism.
Not backing the strike however were members of the engineering union, the ASE -a craft union.
When management then threatened to sack the strikers the strike collapsed. Maclean would later write that what had undermined the worker's cause was the "lack of feeling of class solidarity."