This one offers a Gilbert American Flyer #16B 175-watt transformer in a 22050 original box with original inserts and instruction sheet.  The box is in nice shape but does have some partial flap separation with brown paper tape repair on the inside of one of the flaps.  The label is nice and a clear date stamp is present on the front of the box of DEG (4/57).  

This is an interesting one in that this 16B was in a 22050 original box.  The 175 watt 16B's are noted as stopping production in 1956 but the box has an April, 1957 date stamp.  Not sure if this transformer was put in a 5 digit box post-factory or if it was leftover stock and packaged this way at the factory.  The collection this came from was fairly diverse and well matched, but I don't know for sure if it came from the factory this way.  At any rate, the box fits the transformer fine and has all of the inner inserts and is in excellent condition.  There is a small hairline crack in the case on this one.

Multimeter readings look good:

Base/18v Fixed: 18.8v

Variable at 0: 5.49v

Variable full throttle: 19.28v

The circuit breaker works when tripped and resets fine.  Both lights work as does the on/off switch.  Power cord is pliable.

TCA #97-45581.  Thanks for looking and please see my other listings for quality American Flyer items.  Questions please let me know.  I'm always happy to combine multiple purchases to save on shipping.  If you are combining multiple lots, please wait for me to send you an invoice via eBay which will reflect combined shipping costs.  Payment appreciated within 3 days of auctions end.  Be assured that this will be packaged properly for shipment.  Internal reference #F2693.