For your consideration, I have a NEW OLD STOCK Lawson Airline Modular FRL (Filter Regulator Lubrication) Salesman Kit.   Please see pictures for details on the different components.  These items are new old stock.  The case has some rust on handles but locking mechanism is in good working condition.  See last picture for a list of everything included.  This comes from a smoke free home.  I will be listing several vintage items so check out my other listings as I will combine shipping on multiple sales.