Is the Alpine 4735 Delta Crib recalled?

Yes. Below are all the Delta crib models that have been recalled. You can go to the deltacribrecall website (see the link further down this page) to complete the form for a retrofit kit.

Delta cribs manufactured in Taiwan or Indonesia, with the "Crib Trigger Lock with Safety Peg" drop side hardware design, numbers:
4320, 4340, 4500, 4520, 4530, 4532, 4540, 4542, 4550, 4551, 4580, 4600, 4620, 4624 (production dates 01/06 thru 11/07), 4640, 4660, 4720, 4735, 4742, 4750 (production dates 01/95 thru 12/00), 4760 4770, 4780, 4790, 4820, 4840, 4850, 4860, 4880, 4890, 4892, 4900, 4910, 4920, 4925-2, 4925-6, 4930, 4940, 4943, 4944, 4947, 4948, 4949, 4950, 4958, 4963, 4968, 4969, 4980.

Delta drop side cribs manufactured in China through 2005, with the "Crib Trigger Lock with Spring Peg" drop side hardware design, numbers:
4340, 4343, 4520, 4600, 4620, 4624, 4625, 4629, 4660, 4665, 4720, 4750, 4751, 4850, 4855, 4857, 4880, 4920, 4925-2, 4925-2B, 4925-6, 4980, and 8605.