In that it is marked “NO 37748” then I have to assume that is a manufacturing Part #.
And if so, one might be wasting their time trying to figure out what it means.
And what I mean by that is, …. the #’s might have to be read as, to wit:
3 …. 77 …. 48 …… (3-77-48)
3 … 774 … 8 …… (3-774-8)
37 …. 74 … 8 …… (37-74-8)
37 …. 7 … 48 …… (37-7-48)
377 … 48 …… (377-48)
Manufacturer’s have all sorts of different “numbering” schemes so that they can keep “in-house” track of what they are producing for sell to vendors.
In other words, …. “part #’s” are the employee’s “language” ….. and that is bout all they “talk” … from sales orders to finished goods shipment.
HA, the boss man might say, …. “We just got an order for a thousand 37748’s and they want them by next Friday …. so get them made and shipped by next Wednesday noon”.
And every employee knows what has to be done without any further explanation.