Reads “ Standard screw driver shop use”
Actually, it reads "STANDARD SCREW DRIVERS
FOR SHOP USE." I'm not sure how that changes the meaning, or the purpose, if at all, which is still a matter of interpretation to begin with, but it could.
IMO it maybe from a screwdriver factory. Does TR relate to anything?
My guess for "T.R." would be Tool Room. With "2ND FLOOR" implying multiple floors, and "NO. 1 BUILDING" implying multiple buildings, if it's a screwdriver factory, it is a dang big one.
Another possibility is it's a big factory of some other kind and the guide is associated with maintaining the tips of screwdrivers used in the shop and kept in the tool room on the 2nd floor of building No. 1.