Are all small loop oil dipsticks repops?
 

I have a 1940 diamond block in my car. It has a small loop dipstick and leaks oil till it gets to the low side of the range. I saw a ebay sale(linked below) of large loops dipsticks and a round loop. The round being about .5 to 1 inch shorter than the large loop. It listed the round loop as late model. Question being are round loop late model or just reproduction? I plan to get a large loop stick when I find one. https://www.ebay.com/itm/Model-A-Dip...8AAOSwLSZb1y7N

Re: Are all small loop oil dipsticks repops?
 

The larger bayonet style was used early in production until it was switched to that round hole dipstick in January 1929, which was used to the end of production.

Re: Are all small loop oil dipsticks repops?
 

Is there a reason for the different lengths? Are the level marks at the same oil level?