Need info on Ambroid NYC Container Car

I just bought an Ambroid NYC Container Car (1 of 5000) kit. Now that I own it I got to wondering… when was the prototype in service, what was carried in the containers, etc?

The prototype was an all-wood, truss rod car which implies not much later than 1910-ish. The containers are wood boxes reinforced with metal banding and have double doors at one end which suggest the cargo would be general merchandise, not bulk mineral or chemical products.

Anyone familiar with the history?