can anyone help i.d. this bike?
After a time on bing it looks a lot like a Vintage Murray Sportcrest or Sears Murray Sportcrest.

There is a pic of one here: https://uk.pinterest.com/pin/54465476715653140/

And on ebay here: http://www.ebay.com/itm/Vintage-Murray-26-Boys-Bike-Good-condition-/201618469157?hash=item2ef165b125



When searching for Vintage Murray Bicycles there are others by the same manufacturer pictured with very similar frame shape, the extra top tube that curves down and joins the down tube.

km